Proof of Theorem 25or6to4
| Step | Hyp | Ref
| Expression |
| 1 | | 25or6to4.a |
. . 3
⊢ (𝜑 → 𝐴 = 1) |
| 2 | | ax-1cn 11154 |
. . 3
⊢ 1 ∈
ℂ |
| 3 | 1, 2 | eqeltrdi 2877 |
. 2
⊢ (𝜑 → 𝐴 ∈ ℂ) |
| 4 | | ax-1ne0 11165 |
. . . 4
⊢ 1 ≠
0 |
| 5 | 4 | a1i 11 |
. . 3
⊢ (𝜑 → 1 ≠ 0) |
| 6 | 1, 5 | eqnetrd 3031 |
. 2
⊢ (𝜑 → 𝐴 ≠ 0) |
| 7 | | 25or6to4.b |
. . 3
⊢ (𝜑 → 𝐵 = -(;53 / 2)) |
| 8 | | df-dec 12708 |
. . . . . 6
⊢ ;53 = (((9 + 1) · 5) +
3) |
| 9 | | 9cn 12337 |
. . . . . . . . 9
⊢ 9 ∈
ℂ |
| 10 | 9, 2 | addcli 11211 |
. . . . . . . 8
⊢ (9 + 1)
∈ ℂ |
| 11 | | 5cn 12325 |
. . . . . . . 8
⊢ 5 ∈
ℂ |
| 12 | 10, 11 | mulcli 11212 |
. . . . . . 7
⊢ ((9 + 1)
· 5) ∈ ℂ |
| 13 | | 3cn 12318 |
. . . . . . 7
⊢ 3 ∈
ℂ |
| 14 | 12, 13 | addcli 11211 |
. . . . . 6
⊢ (((9 + 1)
· 5) + 3) ∈ ℂ |
| 15 | 8, 14 | eqeltri 2865 |
. . . . 5
⊢ ;53 ∈ ℂ |
| 16 | | 2cn 12312 |
. . . . 5
⊢ 2 ∈
ℂ |
| 17 | | 2ne0 12343 |
. . . . 5
⊢ 2 ≠
0 |
| 18 | 15, 16, 17 | divcli 11953 |
. . . 4
⊢ (;53 / 2) ∈ ℂ |
| 19 | 18 | negcli 11522 |
. . 3
⊢ -(;53 / 2) ∈ ℂ |
| 20 | 7, 19 | eqeltrdi 2877 |
. 2
⊢ (𝜑 → 𝐵 ∈ ℂ) |
| 21 | | 25or6to4.c |
. . 3
⊢ (𝜑 → 𝐶 = (;75 / 2)) |
| 22 | | df-dec 12708 |
. . . . 5
⊢ ;75 = (((9 + 1) · 7) +
5) |
| 23 | 9, 2 | addcli 11211 |
. . . . . . 7
⊢ (9 + 1)
∈ ℂ |
| 24 | | 7cn 12331 |
. . . . . . 7
⊢ 7 ∈
ℂ |
| 25 | 23, 24 | mulcli 11212 |
. . . . . 6
⊢ ((9 + 1)
· 7) ∈ ℂ |
| 26 | 25, 11 | addcli 11211 |
. . . . 5
⊢ (((9 + 1)
· 7) + 5) ∈ ℂ |
| 27 | 22, 26 | eqeltri 2865 |
. . . 4
⊢ ;75 ∈ ℂ |
| 28 | 27, 16, 17 | divcli 11953 |
. . 3
⊢ (;75 / 2) ∈ ℂ |
| 29 | 21, 28 | eqeltrdi 2877 |
. 2
⊢ (𝜑 → 𝐶 ∈ ℂ) |
| 30 | | 25or6to4.x |
. 2
⊢ (𝜑 → 𝑋 ∈ ℂ) |
| 31 | | df-dec 12708 |
. . . 4
⊢ ;25 = (((9 + 1) · 2) +
5) |
| 32 | 9, 2 | addcli 11211 |
. . . . . 6
⊢ (9 + 1)
∈ ℂ |
| 33 | 32, 16 | mulcli 11212 |
. . . . 5
⊢ ((9 + 1)
· 2) ∈ ℂ |
| 34 | 33, 11 | addcli 11211 |
. . . 4
⊢ (((9 + 1)
· 2) + 5) ∈ ℂ |
| 35 | 31, 34 | eqeltri 2865 |
. . 3
⊢ ;25 ∈ ℂ |
| 36 | 35 | a1i 11 |
. 2
⊢ (𝜑 → ;25 ∈ ℂ) |
| 37 | | 6cn 12328 |
. . . 4
⊢ 6 ∈
ℂ |
| 38 | | 4cn 12322 |
. . . 4
⊢ 4 ∈
ℂ |
| 39 | | 4ne0 12348 |
. . . 4
⊢ 4 ≠
0 |
| 40 | 37, 38, 39 | divcli 11953 |
. . 3
⊢ (6 / 4)
∈ ℂ |
| 41 | 40 | a1i 11 |
. 2
⊢ (𝜑 → (6 / 4) ∈
ℂ) |
| 42 | | df-dec 12708 |
. . . . . . . . . . 11
⊢ ;25 = (((9 + 1) · 2) +
5) |
| 43 | 9, 2 | addcli 11211 |
. . . . . . . . . . . . 13
⊢ (9 + 1)
∈ ℂ |
| 44 | 43, 16 | mulcli 11212 |
. . . . . . . . . . . 12
⊢ ((9 + 1)
· 2) ∈ ℂ |
| 45 | 44, 11 | addcli 11211 |
. . . . . . . . . . 11
⊢ (((9 + 1)
· 2) + 5) ∈ ℂ |
| 46 | 42, 45 | eqeltri 2865 |
. . . . . . . . . 10
⊢ ;25 ∈ ℂ |
| 47 | 46, 16, 17 | divcan4i 11958 |
. . . . . . . . 9
⊢ ((;25 · 2) / 2) = ;25 |
| 48 | | 2nn0 12517 |
. . . . . . . . . . 11
⊢ 2 ∈
ℕ0 |
| 49 | | 5nn0 12520 |
. . . . . . . . . . 11
⊢ 5 ∈
ℕ0 |
| 50 | | eqid 2769 |
. . . . . . . . . . 11
⊢ ;25 = ;25 |
| 51 | | 0nn0 12515 |
. . . . . . . . . . 11
⊢ 0 ∈
ℕ0 |
| 52 | | 1nn0 12516 |
. . . . . . . . . . 11
⊢ 1 ∈
ℕ0 |
| 53 | | 2t2e4 12400 |
. . . . . . . . . . . . 13
⊢ (2
· 2) = 4 |
| 54 | 53 | oveq1i 7418 |
. . . . . . . . . . . 12
⊢ ((2
· 2) + 1) = (4 + 1) |
| 55 | | 4p1e5 12382 |
. . . . . . . . . . . 12
⊢ (4 + 1) =
5 |
| 56 | 54, 55 | eqtri 2792 |
. . . . . . . . . . 11
⊢ ((2
· 2) + 1) = 5 |
| 57 | | 5t2e10 12812 |
. . . . . . . . . . 11
⊢ (5
· 2) = ;10 |
| 58 | 48, 48, 49, 50, 51, 52, 56, 57 | decmul1c 12777 |
. . . . . . . . . 10
⊢ (;25 · 2) = ;50 |
| 59 | 58 | oveq1i 7418 |
. . . . . . . . 9
⊢ ((;25 · 2) / 2) = (;50 / 2) |
| 60 | 47, 59 | eqtr3i 2794 |
. . . . . . . 8
⊢ ;25 = (;50 / 2) |
| 61 | | 6t2e12 12816 |
. . . . . . . . . 10
⊢ (6
· 2) = ;12 |
| 62 | | 4t3e12 12810 |
. . . . . . . . . . 11
⊢ (4
· 3) = ;12 |
| 63 | 38, 13, 62 | mulcomli 11214 |
. . . . . . . . . 10
⊢ (3
· 4) = ;12 |
| 64 | 61, 63 | eqtr4i 2795 |
. . . . . . . . 9
⊢ (6
· 2) = (3 · 4) |
| 65 | 37, 13 | pm3.2i 475 |
. . . . . . . . . . 11
⊢ (6 ∈
ℂ ∧ 3 ∈ ℂ) |
| 66 | 38, 39 | pm3.2i 475 |
. . . . . . . . . . . 12
⊢ (4 ∈
ℂ ∧ 4 ≠ 0) |
| 67 | | 2cnne0 12449 |
. . . . . . . . . . . 12
⊢ (2 ∈
ℂ ∧ 2 ≠ 0) |
| 68 | 66, 67 | pm3.2i 475 |
. . . . . . . . . . 11
⊢ ((4
∈ ℂ ∧ 4 ≠ 0) ∧ (2 ∈ ℂ ∧ 2 ≠
0)) |
| 69 | 65, 68 | pm3.2i 475 |
. . . . . . . . . 10
⊢ ((6
∈ ℂ ∧ 3 ∈ ℂ) ∧ ((4 ∈ ℂ ∧ 4 ≠ 0)
∧ (2 ∈ ℂ ∧ 2 ≠ 0))) |
| 70 | | divmuleq 11916 |
. . . . . . . . . 10
⊢ (((6
∈ ℂ ∧ 3 ∈ ℂ) ∧ ((4 ∈ ℂ ∧ 4 ≠ 0)
∧ (2 ∈ ℂ ∧ 2 ≠ 0))) → ((6 / 4) = (3 / 2) ↔ (6
· 2) = (3 · 4))) |
| 71 | 69, 70 | ax-mp 5 |
. . . . . . . . 9
⊢ ((6 / 4)
= (3 / 2) ↔ (6 · 2) = (3 · 4)) |
| 72 | 64, 71 | mpbir 234 |
. . . . . . . 8
⊢ (6 / 4) =
(3 / 2) |
| 73 | 60, 72 | oveq12i 7420 |
. . . . . . 7
⊢ (;25 + (6 / 4)) = ((;50 / 2) + (3 / 2)) |
| 74 | | dfdec10 12710 |
. . . . . . . . . 10
⊢ ;53 = ((;10 · 5) + 3) |
| 75 | 49 | dec0u 12733 |
. . . . . . . . . . 11
⊢ (;10 · 5) = ;50 |
| 76 | 75 | oveq1i 7418 |
. . . . . . . . . 10
⊢ ((;10 · 5) + 3) = (;50 + 3) |
| 77 | 74, 76 | eqtri 2792 |
. . . . . . . . 9
⊢ ;53 = (;50 + 3) |
| 78 | 77 | oveq1i 7418 |
. . . . . . . 8
⊢ (;53 / 2) = ((;50 + 3) / 2) |
| 79 | | df-dec 12708 |
. . . . . . . . . 10
⊢ ;50 = (((9 + 1) · 5) +
0) |
| 80 | 9, 2 | addcli 11211 |
. . . . . . . . . . . 12
⊢ (9 + 1)
∈ ℂ |
| 81 | 80, 11 | mulcli 11212 |
. . . . . . . . . . 11
⊢ ((9 + 1)
· 5) ∈ ℂ |
| 82 | | 0cn 11194 |
. . . . . . . . . . 11
⊢ 0 ∈
ℂ |
| 83 | 81, 82 | addcli 11211 |
. . . . . . . . . 10
⊢ (((9 + 1)
· 5) + 0) ∈ ℂ |
| 84 | 79, 83 | eqeltri 2865 |
. . . . . . . . 9
⊢ ;50 ∈ ℂ |
| 85 | 84, 13, 16, 17 | divdiri 11968 |
. . . . . . . 8
⊢ ((;50 + 3) / 2) = ((;50 / 2) + (3 / 2)) |
| 86 | 78, 85 | eqtri 2792 |
. . . . . . 7
⊢ (;53 / 2) = ((;50 / 2) + (3 / 2)) |
| 87 | 73, 86 | eqtr4i 2795 |
. . . . . 6
⊢ (;25 + (6 / 4)) = (;53 / 2) |
| 88 | | df-dec 12708 |
. . . . . . . 8
⊢ ;53 = (((9 + 1) · 5) +
3) |
| 89 | 9, 2 | addcli 11211 |
. . . . . . . . . 10
⊢ (9 + 1)
∈ ℂ |
| 90 | 89, 11 | mulcli 11212 |
. . . . . . . . 9
⊢ ((9 + 1)
· 5) ∈ ℂ |
| 91 | 90, 13 | addcli 11211 |
. . . . . . . 8
⊢ (((9 + 1)
· 5) + 3) ∈ ℂ |
| 92 | 88, 91 | eqeltri 2865 |
. . . . . . 7
⊢ ;53 ∈ ℂ |
| 93 | 92, 16, 17 | divcli 11953 |
. . . . . 6
⊢ (;53 / 2) ∈ ℂ |
| 94 | 87, 93 | eqeltri 2865 |
. . . . 5
⊢ (;25 + (6 / 4)) ∈
ℂ |
| 95 | 94 | negnegi 11524 |
. . . 4
⊢ --(;25 + (6 / 4)) = (;25 + (6 / 4)) |
| 96 | | df-dec 12708 |
. . . . . . . . . . . 12
⊢ ;25 = (((9 + 1) · 2) +
5) |
| 97 | 9, 2 | addcli 11211 |
. . . . . . . . . . . . . 14
⊢ (9 + 1)
∈ ℂ |
| 98 | 97, 16 | mulcli 11212 |
. . . . . . . . . . . . 13
⊢ ((9 + 1)
· 2) ∈ ℂ |
| 99 | 98, 11 | addcli 11211 |
. . . . . . . . . . . 12
⊢ (((9 + 1)
· 2) + 5) ∈ ℂ |
| 100 | 96, 99 | eqeltri 2865 |
. . . . . . . . . . 11
⊢ ;25 ∈ ℂ |
| 101 | 100, 16, 17 | divcan4i 11958 |
. . . . . . . . . 10
⊢ ((;25 · 2) / 2) = ;25 |
| 102 | | eqid 2769 |
. . . . . . . . . . . 12
⊢ ;25 = ;25 |
| 103 | 53 | oveq1i 7418 |
. . . . . . . . . . . . 13
⊢ ((2
· 2) + 1) = (4 + 1) |
| 104 | 103, 55 | eqtri 2792 |
. . . . . . . . . . . 12
⊢ ((2
· 2) + 1) = 5 |
| 105 | 48, 48, 49, 102, 51, 52, 104, 57 | decmul1c 12777 |
. . . . . . . . . . 11
⊢ (;25 · 2) = ;50 |
| 106 | 105 | oveq1i 7418 |
. . . . . . . . . 10
⊢ ((;25 · 2) / 2) = (;50 / 2) |
| 107 | 101, 106 | eqtr3i 2794 |
. . . . . . . . 9
⊢ ;25 = (;50 / 2) |
| 108 | 38, 13, 62 | mulcomli 11214 |
. . . . . . . . . . 11
⊢ (3
· 4) = ;12 |
| 109 | 61, 108 | eqtr4i 2795 |
. . . . . . . . . 10
⊢ (6
· 2) = (3 · 4) |
| 110 | 37, 13 | pm3.2i 475 |
. . . . . . . . . . . 12
⊢ (6 ∈
ℂ ∧ 3 ∈ ℂ) |
| 111 | 38, 39 | pm3.2i 475 |
. . . . . . . . . . . . 13
⊢ (4 ∈
ℂ ∧ 4 ≠ 0) |
| 112 | 111, 67 | pm3.2i 475 |
. . . . . . . . . . . 12
⊢ ((4
∈ ℂ ∧ 4 ≠ 0) ∧ (2 ∈ ℂ ∧ 2 ≠
0)) |
| 113 | 110, 112 | pm3.2i 475 |
. . . . . . . . . . 11
⊢ ((6
∈ ℂ ∧ 3 ∈ ℂ) ∧ ((4 ∈ ℂ ∧ 4 ≠ 0)
∧ (2 ∈ ℂ ∧ 2 ≠ 0))) |
| 114 | | divmuleq 11916 |
. . . . . . . . . . 11
⊢ (((6
∈ ℂ ∧ 3 ∈ ℂ) ∧ ((4 ∈ ℂ ∧ 4 ≠ 0)
∧ (2 ∈ ℂ ∧ 2 ≠ 0))) → ((6 / 4) = (3 / 2) ↔ (6
· 2) = (3 · 4))) |
| 115 | 113, 114 | ax-mp 5 |
. . . . . . . . . 10
⊢ ((6 / 4)
= (3 / 2) ↔ (6 · 2) = (3 · 4)) |
| 116 | 109, 115 | mpbir 234 |
. . . . . . . . 9
⊢ (6 / 4) =
(3 / 2) |
| 117 | 107, 116 | oveq12i 7420 |
. . . . . . . 8
⊢ (;25 + (6 / 4)) = ((;50 / 2) + (3 / 2)) |
| 118 | | dfdec10 12710 |
. . . . . . . . . . 11
⊢ ;53 = ((;10 · 5) + 3) |
| 119 | 49 | dec0u 12733 |
. . . . . . . . . . . 12
⊢ (;10 · 5) = ;50 |
| 120 | 119 | oveq1i 7418 |
. . . . . . . . . . 11
⊢ ((;10 · 5) + 3) = (;50 + 3) |
| 121 | 118, 120 | eqtri 2792 |
. . . . . . . . . 10
⊢ ;53 = (;50 + 3) |
| 122 | 121 | oveq1i 7418 |
. . . . . . . . 9
⊢ (;53 / 2) = ((;50 + 3) / 2) |
| 123 | | df-dec 12708 |
. . . . . . . . . . 11
⊢ ;50 = (((9 + 1) · 5) +
0) |
| 124 | 9, 2 | addcli 11211 |
. . . . . . . . . . . . 13
⊢ (9 + 1)
∈ ℂ |
| 125 | 124, 11 | mulcli 11212 |
. . . . . . . . . . . 12
⊢ ((9 + 1)
· 5) ∈ ℂ |
| 126 | 125, 82 | addcli 11211 |
. . . . . . . . . . 11
⊢ (((9 + 1)
· 5) + 0) ∈ ℂ |
| 127 | 123, 126 | eqeltri 2865 |
. . . . . . . . . 10
⊢ ;50 ∈ ℂ |
| 128 | 127, 13, 16, 17 | divdiri 11968 |
. . . . . . . . 9
⊢ ((;50 + 3) / 2) = ((;50 / 2) + (3 / 2)) |
| 129 | 122, 128 | eqtri 2792 |
. . . . . . . 8
⊢ (;53 / 2) = ((;50 / 2) + (3 / 2)) |
| 130 | 117, 129 | eqtr4i 2795 |
. . . . . . 7
⊢ (;25 + (6 / 4)) = (;53 / 2) |
| 131 | 130 | negeqi 11446 |
. . . . . 6
⊢ -(;25 + (6 / 4)) = -(;53 / 2) |
| 132 | | df-dec 12708 |
. . . . . . . . . 10
⊢ ;53 = (((9 + 1) · 5) +
3) |
| 133 | 9, 2 | addcli 11211 |
. . . . . . . . . . . 12
⊢ (9 + 1)
∈ ℂ |
| 134 | 133, 11 | mulcli 11212 |
. . . . . . . . . . 11
⊢ ((9 + 1)
· 5) ∈ ℂ |
| 135 | 134, 13 | addcli 11211 |
. . . . . . . . . 10
⊢ (((9 + 1)
· 5) + 3) ∈ ℂ |
| 136 | 132, 135 | eqeltri 2865 |
. . . . . . . . 9
⊢ ;53 ∈ ℂ |
| 137 | 136, 16, 17 | divcli 11953 |
. . . . . . . 8
⊢ (;53 / 2) ∈ ℂ |
| 138 | 137 | negcli 11522 |
. . . . . . 7
⊢ -(;53 / 2) ∈ ℂ |
| 139 | 138 | div1i 11939 |
. . . . . 6
⊢ (-(;53 / 2) / 1) = -(;53 / 2) |
| 140 | 131, 139 | eqtr4i 2795 |
. . . . 5
⊢ -(;25 + (6 / 4)) = (-(;53 / 2) / 1) |
| 141 | 140 | negeqi 11446 |
. . . 4
⊢ --(;25 + (6 / 4)) = -(-(;53 / 2) / 1) |
| 142 | 95, 141 | eqtr3i 2794 |
. . 3
⊢ (;25 + (6 / 4)) = -(-(;53 / 2) / 1) |
| 143 | 7, 1 | oveq12d 7426 |
. . . 4
⊢ (𝜑 → (𝐵 / 𝐴) = (-(;53 / 2) / 1)) |
| 144 | 143 | negeqd 11447 |
. . 3
⊢ (𝜑 → -(𝐵 / 𝐴) = -(-(;53 / 2) / 1)) |
| 145 | 142, 144 | eqtr4id 2823 |
. 2
⊢ (𝜑 → (;25 + (6 / 4)) = -(𝐵 / 𝐴)) |
| 146 | | df-dec 12708 |
. . . . . . 7
⊢ ;75 = (((9 + 1) · 7) +
5) |
| 147 | 9, 2 | addcli 11211 |
. . . . . . . . 9
⊢ (9 + 1)
∈ ℂ |
| 148 | 147, 24 | mulcli 11212 |
. . . . . . . 8
⊢ ((9 + 1)
· 7) ∈ ℂ |
| 149 | 148, 11 | addcli 11211 |
. . . . . . 7
⊢ (((9 + 1)
· 7) + 5) ∈ ℂ |
| 150 | 146, 149 | eqeltri 2865 |
. . . . . 6
⊢ ;75 ∈ ℂ |
| 151 | 150, 16, 17 | divcli 11953 |
. . . . 5
⊢ (;75 / 2) ∈ ℂ |
| 152 | 151 | div1i 11939 |
. . . 4
⊢ ((;75 / 2) / 1) = (;75 / 2) |
| 153 | | df-dec 12708 |
. . . . . . 7
⊢ ;25 = (((9 + 1) · 2) +
5) |
| 154 | 9, 2 | addcli 11211 |
. . . . . . . . 9
⊢ (9 + 1)
∈ ℂ |
| 155 | 154, 16 | mulcli 11212 |
. . . . . . . 8
⊢ ((9 + 1)
· 2) ∈ ℂ |
| 156 | 155, 11 | addcli 11211 |
. . . . . . 7
⊢ (((9 + 1)
· 2) + 5) ∈ ℂ |
| 157 | 153, 156 | eqeltri 2865 |
. . . . . 6
⊢ ;25 ∈ ℂ |
| 158 | 157, 13, 16, 17 | divassi 11967 |
. . . . 5
⊢ ((;25 · 3) / 2) = (;25 · (3 / 2)) |
| 159 | | 3nn0 12518 |
. . . . . . 7
⊢ 3 ∈
ℕ0 |
| 160 | | eqid 2769 |
. . . . . . 7
⊢ ;25 = ;25 |
| 161 | | 2t3e6 12403 |
. . . . . . . . 9
⊢ (2
· 3) = 6 |
| 162 | 161 | oveq1i 7418 |
. . . . . . . 8
⊢ ((2
· 3) + 1) = (6 + 1) |
| 163 | | 6p1e7 12384 |
. . . . . . . 8
⊢ (6 + 1) =
7 |
| 164 | 162, 163 | eqtri 2792 |
. . . . . . 7
⊢ ((2
· 3) + 1) = 7 |
| 165 | | 5t3e15 12813 |
. . . . . . 7
⊢ (5
· 3) = ;15 |
| 166 | 159, 48, 49, 160, 49, 52, 164, 165 | decmul1c 12777 |
. . . . . 6
⊢ (;25 · 3) = ;75 |
| 167 | 166 | oveq1i 7418 |
. . . . 5
⊢ ((;25 · 3) / 2) = (;75 / 2) |
| 168 | 158, 167 | eqtr3i 2794 |
. . . 4
⊢ (;25 · (3 / 2)) = (;75 / 2) |
| 169 | 38, 13, 62 | mulcomli 11214 |
. . . . . . . 8
⊢ (3
· 4) = ;12 |
| 170 | 61, 169 | eqtr4i 2795 |
. . . . . . 7
⊢ (6
· 2) = (3 · 4) |
| 171 | 37, 13 | pm3.2i 475 |
. . . . . . . . 9
⊢ (6 ∈
ℂ ∧ 3 ∈ ℂ) |
| 172 | 38, 39 | pm3.2i 475 |
. . . . . . . . . 10
⊢ (4 ∈
ℂ ∧ 4 ≠ 0) |
| 173 | 172, 67 | pm3.2i 475 |
. . . . . . . . 9
⊢ ((4
∈ ℂ ∧ 4 ≠ 0) ∧ (2 ∈ ℂ ∧ 2 ≠
0)) |
| 174 | 171, 173 | pm3.2i 475 |
. . . . . . . 8
⊢ ((6
∈ ℂ ∧ 3 ∈ ℂ) ∧ ((4 ∈ ℂ ∧ 4 ≠ 0)
∧ (2 ∈ ℂ ∧ 2 ≠ 0))) |
| 175 | | divmuleq 11916 |
. . . . . . . 8
⊢ (((6
∈ ℂ ∧ 3 ∈ ℂ) ∧ ((4 ∈ ℂ ∧ 4 ≠ 0)
∧ (2 ∈ ℂ ∧ 2 ≠ 0))) → ((6 / 4) = (3 / 2) ↔ (6
· 2) = (3 · 4))) |
| 176 | 174, 175 | ax-mp 5 |
. . . . . . 7
⊢ ((6 / 4)
= (3 / 2) ↔ (6 · 2) = (3 · 4)) |
| 177 | 170, 176 | mpbir 234 |
. . . . . 6
⊢ (6 / 4) =
(3 / 2) |
| 178 | 177 | oveq2i 7419 |
. . . . 5
⊢ (;25 · (6 / 4)) = (;25 · (3 / 2)) |
| 179 | 178 | eqcomi 2778 |
. . . 4
⊢ (;25 · (3 / 2)) = (;25 · (6 / 4)) |
| 180 | 152, 168,
179 | 3eqtr2ri 2799 |
. . 3
⊢ (;25 · (6 / 4)) = ((;75 / 2) / 1) |
| 181 | 21, 1 | oveq12d 7426 |
. . 3
⊢ (𝜑 → (𝐶 / 𝐴) = ((;75 / 2) / 1)) |
| 182 | 180, 181 | eqtr4id 2823 |
. 2
⊢ (𝜑 → (;25 · (6 / 4)) = (𝐶 / 𝐴)) |
| 183 | 3, 6, 20, 29, 30, 36, 41, 145, 182 | quadfac 42857 |
1
⊢ (𝜑 → (((𝐴 · (𝑋↑2)) + ((𝐵 · 𝑋) + 𝐶)) = 0 ↔ (𝑋 = ;25 ∨ 𝑋 = (6 / 4)))) |