mulbinom2 - Intuitionistic Logic Explorer

	Intuitionistic Logic Explorer		< Previous Next > Nearby theorems
Mirrors > Home > ILE Home > Th. List > mulbinom2		GIF version

Theorem mulbinom2 10683

Description: The square of a binomial with factor. (Contributed by AV, 19-Jul-2021.)

**Assertion**
Ref	Expression
mulbinom2	⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (((𝐶 · 𝐴) + 𝐵)↑2) = ((((𝐶 · 𝐴)↑2) + ((2 · 𝐶) · (𝐴 · 𝐵))) + (𝐵↑2)))

**Proof of Theorem mulbinom2**
Step	Hyp	Ref	Expression
1		mulcl 7978	. . . . 5 ⊢ ((𝐶 ∈ ℂ ∧ 𝐴 ∈ ℂ) → (𝐶 · 𝐴) ∈ ℂ)
2	1	ancoms 268	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (𝐶 · 𝐴) ∈ ℂ)
3	2	3adant2 1018	. . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (𝐶 · 𝐴) ∈ ℂ)
4		simp2 1000	. . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → 𝐵 ∈ ℂ)
5		binom2 10678	. . 3 ⊢ (((𝐶 · 𝐴) ∈ ℂ ∧ 𝐵 ∈ ℂ) → (((𝐶 · 𝐴) + 𝐵)↑2) = ((((𝐶 · 𝐴)↑2) + (2 · ((𝐶 · 𝐴) · 𝐵))) + (𝐵↑2)))
6	3, 4, 5	syl2anc 411	. 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (((𝐶 · 𝐴) + 𝐵)↑2) = ((((𝐶 · 𝐴)↑2) + (2 · ((𝐶 · 𝐴) · 𝐵))) + (𝐵↑2)))
7		mulass 7982	. . . . . . 7 ⊢ ((𝐶 ∈ ℂ ∧ 𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((𝐶 · 𝐴) · 𝐵) = (𝐶 · (𝐴 · 𝐵)))
8	7	3coml 1212	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → ((𝐶 · 𝐴) · 𝐵) = (𝐶 · (𝐴 · 𝐵)))
9	8	oveq2d 5920	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (2 · ((𝐶 · 𝐴) · 𝐵)) = (2 · (𝐶 · (𝐴 · 𝐵))))
10		2cnd 9033	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → 2 ∈ ℂ)
11		simp3 1001	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → 𝐶 ∈ ℂ)
12		mulcl 7978	. . . . . . 7 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐴 · 𝐵) ∈ ℂ)
13	12	3adant3 1019	. . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (𝐴 · 𝐵) ∈ ℂ)
14	10, 11, 13	mulassd 8022	. . . . 5 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → ((2 · 𝐶) · (𝐴 · 𝐵)) = (2 · (𝐶 · (𝐴 · 𝐵))))
15	9, 14	eqtr4d 2225	. . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (2 · ((𝐶 · 𝐴) · 𝐵)) = ((2 · 𝐶) · (𝐴 · 𝐵)))
16	15	oveq2d 5920	. . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (((𝐶 · 𝐴)↑2) + (2 · ((𝐶 · 𝐴) · 𝐵))) = (((𝐶 · 𝐴)↑2) + ((2 · 𝐶) · (𝐴 · 𝐵))))
17	16	oveq1d 5919	. 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → ((((𝐶 · 𝐴)↑2) + (2 · ((𝐶 · 𝐴) · 𝐵))) + (𝐵↑2)) = ((((𝐶 · 𝐴)↑2) + ((2 · 𝐶) · (𝐴 · 𝐵))) + (𝐵↑2)))
18	6, 17	eqtrd 2222	1 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (((𝐶 · 𝐴) + 𝐵)↑2) = ((((𝐶 · 𝐴)↑2) + ((2 · 𝐶) · (𝐴 · 𝐵))) + (𝐵↑2)))

Colors of variables: wff set class

Syntax hints: → wi 4 ∧ w3a 980 = wceq 1364 ∈ wcel 2160 (class class class)co 5904 ℂcc 7849 + caddc 7854 · cmul 7856 2c2 9011 ↑cexp 10565

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 615 ax-in2 616 ax-io 710 ax-5 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-13 2162 ax-14 2163 ax-ext 2171 ax-coll 4140 ax-sep 4143 ax-nul 4151 ax-pow 4199 ax-pr 4234 ax-un 4458 ax-setind 4561 ax-iinf 4612 ax-cnex 7942 ax-resscn 7943 ax-1cn 7944 ax-1re 7945 ax-icn 7946 ax-addcl 7947 ax-addrcl 7948 ax-mulcl 7949 ax-mulrcl 7950 ax-addcom 7951 ax-mulcom 7952 ax-addass 7953 ax-mulass 7954 ax-distr 7955 ax-i2m1 7956 ax-0lt1 7957 ax-1rid 7958 ax-0id 7959 ax-rnegex 7960 ax-precex 7961 ax-cnre 7962 ax-pre-ltirr 7963 ax-pre-ltwlin 7964 ax-pre-lttrn 7965 ax-pre-apti 7966 ax-pre-ltadd 7967 ax-pre-mulgt0 7968 ax-pre-mulext 7969

This theorem depends on definitions: df-bi 117 df-dc 836 df-3or 981 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1472 df-sb 1774 df-eu 2041 df-mo 2042 df-clab 2176 df-cleq 2182 df-clel 2185 df-nfc 2321 df-ne 2361 df-nel 2456 df-ral 2473 df-rex 2474 df-reu 2475 df-rmo 2476 df-rab 2477 df-v 2758 df-sbc 2982 df-csb 3077 df-dif 3150 df-un 3152 df-in 3154 df-ss 3161 df-nul 3442 df-if 3554 df-pw 3599 df-sn 3620 df-pr 3621 df-op 3623 df-uni 3832 df-int 3867 df-iun 3910 df-br 4026 df-opab 4087 df-mpt 4088 df-tr 4124 df-id 4318 df-po 4321 df-iso 4322 df-iord 4391 df-on 4393 df-ilim 4394 df-suc 4396 df-iom 4615 df-xp 4657 df-rel 4658 df-cnv 4659 df-co 4660 df-dm 4661 df-rn 4662 df-res 4663 df-ima 4664 df-iota 5203 df-fun 5244 df-fn 5245 df-f 5246 df-f1 5247 df-fo 5248 df-f1o 5249 df-fv 5250 df-riota 5859 df-ov 5907 df-oprab 5908 df-mpo 5909 df-1st 6173 df-2nd 6174 df-recs 6338 df-frec 6424 df-pnf 8035 df-mnf 8036 df-xr 8037 df-ltxr 8038 df-le 8039 df-sub 8171 df-neg 8172 df-reap 8573 df-ap 8580 df-div 8671 df-inn 8961 df-2 9019 df-n0 9218 df-z 9295 df-uz 9570 df-seqfrec 10491 df-exp 10566

This theorem is referenced by: mulsubdivbinom2ap 10738

W3C validator