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| Mirrors > Home > MPE Home > Th. List > Mathboxes > submuladdd | Structured version Visualization version GIF version | ||
| Description: The product of a difference and a sum. Cf. addmulsub 11590. (Contributed by Thierry Arnoux, 6-Jul-2025.) |
| Ref | Expression |
|---|---|
| submuladdd.1 | ⊢ (𝜑 → 𝐴 ∈ ℂ) |
| submuladdd.2 | ⊢ (𝜑 → 𝐵 ∈ ℂ) |
| submuladdd.3 | ⊢ (𝜑 → 𝐶 ∈ ℂ) |
| submuladdd.4 | ⊢ (𝜑 → 𝐷 ∈ ℂ) |
| Ref | Expression |
|---|---|
| submuladdd | ⊢ (𝜑 → ((𝐴 − 𝐵) · (𝐶 + 𝐷)) = (((𝐴 · 𝐶) + (𝐴 · 𝐷)) − ((𝐵 · 𝐶) + (𝐵 · 𝐷)))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | submuladdd.1 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ ℂ) | |
| 2 | submuladdd.2 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ ℂ) | |
| 3 | 1, 2 | subcld 11483 | . . 3 ⊢ (𝜑 → (𝐴 − 𝐵) ∈ ℂ) |
| 4 | submuladdd.3 | . . . 4 ⊢ (𝜑 → 𝐶 ∈ ℂ) | |
| 5 | submuladdd.4 | . . . 4 ⊢ (𝜑 → 𝐷 ∈ ℂ) | |
| 6 | 4, 5 | addcld 11142 | . . 3 ⊢ (𝜑 → (𝐶 + 𝐷) ∈ ℂ) |
| 7 | 3, 6 | mulcomd 11144 | . 2 ⊢ (𝜑 → ((𝐴 − 𝐵) · (𝐶 + 𝐷)) = ((𝐶 + 𝐷) · (𝐴 − 𝐵))) |
| 8 | addmulsub 11590 | . . 3 ⊢ (((𝐶 ∈ ℂ ∧ 𝐷 ∈ ℂ) ∧ (𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ)) → ((𝐶 + 𝐷) · (𝐴 − 𝐵)) = (((𝐶 · 𝐴) + (𝐷 · 𝐴)) − ((𝐶 · 𝐵) + (𝐷 · 𝐵)))) | |
| 9 | 4, 5, 1, 2, 8 | syl22anc 838 | . 2 ⊢ (𝜑 → ((𝐶 + 𝐷) · (𝐴 − 𝐵)) = (((𝐶 · 𝐴) + (𝐷 · 𝐴)) − ((𝐶 · 𝐵) + (𝐷 · 𝐵)))) |
| 10 | 4, 1 | mulcomd 11144 | . . . 4 ⊢ (𝜑 → (𝐶 · 𝐴) = (𝐴 · 𝐶)) |
| 11 | 5, 1 | mulcomd 11144 | . . . 4 ⊢ (𝜑 → (𝐷 · 𝐴) = (𝐴 · 𝐷)) |
| 12 | 10, 11 | oveq12d 7373 | . . 3 ⊢ (𝜑 → ((𝐶 · 𝐴) + (𝐷 · 𝐴)) = ((𝐴 · 𝐶) + (𝐴 · 𝐷))) |
| 13 | 4, 2 | mulcomd 11144 | . . . 4 ⊢ (𝜑 → (𝐶 · 𝐵) = (𝐵 · 𝐶)) |
| 14 | 5, 2 | mulcomd 11144 | . . . 4 ⊢ (𝜑 → (𝐷 · 𝐵) = (𝐵 · 𝐷)) |
| 15 | 13, 14 | oveq12d 7373 | . . 3 ⊢ (𝜑 → ((𝐶 · 𝐵) + (𝐷 · 𝐵)) = ((𝐵 · 𝐶) + (𝐵 · 𝐷))) |
| 16 | 12, 15 | oveq12d 7373 | . 2 ⊢ (𝜑 → (((𝐶 · 𝐴) + (𝐷 · 𝐴)) − ((𝐶 · 𝐵) + (𝐷 · 𝐵))) = (((𝐴 · 𝐶) + (𝐴 · 𝐷)) − ((𝐵 · 𝐶) + (𝐵 · 𝐷)))) |
| 17 | 7, 9, 16 | 3eqtrd 2772 | 1 ⊢ (𝜑 → ((𝐴 − 𝐵) · (𝐶 + 𝐷)) = (((𝐴 · 𝐶) + (𝐴 · 𝐷)) − ((𝐵 · 𝐶) + (𝐵 · 𝐷)))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1541 ∈ wcel 2113 (class class class)co 7355 ℂcc 11015 + caddc 11020 · cmul 11022 − cmin 11355 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2705 ax-sep 5238 ax-nul 5248 ax-pow 5307 ax-pr 5374 ax-un 7677 ax-resscn 11074 ax-1cn 11075 ax-icn 11076 ax-addcl 11077 ax-addrcl 11078 ax-mulcl 11079 ax-mulrcl 11080 ax-mulcom 11081 ax-addass 11082 ax-mulass 11083 ax-distr 11084 ax-i2m1 11085 ax-1ne0 11086 ax-1rid 11087 ax-rnegex 11088 ax-rrecex 11089 ax-cnre 11090 ax-pre-lttri 11091 ax-pre-lttrn 11092 ax-pre-ltadd 11093 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2566 df-clab 2712 df-cleq 2725 df-clel 2808 df-nfc 2882 df-ne 2930 df-nel 3034 df-ral 3049 df-rex 3058 df-reu 3348 df-rab 3397 df-v 3439 df-sbc 3738 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-nul 4283 df-if 4477 df-pw 4553 df-sn 4578 df-pr 4580 df-op 4584 df-uni 4861 df-br 5096 df-opab 5158 df-mpt 5177 df-id 5516 df-po 5529 df-so 5530 df-xp 5627 df-rel 5628 df-cnv 5629 df-co 5630 df-dm 5631 df-rn 5632 df-res 5633 df-ima 5634 df-iota 6445 df-fun 6491 df-fn 6492 df-f 6493 df-f1 6494 df-fo 6495 df-f1o 6496 df-fv 6497 df-riota 7312 df-ov 7358 df-oprab 7359 df-mpo 7360 df-er 8631 df-en 8880 df-dom 8881 df-sdom 8882 df-pnf 11159 df-mnf 11160 df-ltxr 11162 df-sub 11357 |
| This theorem is referenced by: constrrtlc1 33817 |
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