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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 11671. (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 11564 | . . 3 ⊢ (𝜑 → (𝐴 − 𝐵) ∈ ℂ) |
| 4 | submuladdd.3 | . . . 4 ⊢ (𝜑 → 𝐶 ∈ ℂ) | |
| 5 | submuladdd.4 | . . . 4 ⊢ (𝜑 → 𝐷 ∈ ℂ) | |
| 6 | 4, 5 | addcld 11223 | . . 3 ⊢ (𝜑 → (𝐶 + 𝐷) ∈ ℂ) |
| 7 | 3, 6 | mulcomd 11225 | . 2 ⊢ (𝜑 → ((𝐴 − 𝐵) · (𝐶 + 𝐷)) = ((𝐶 + 𝐷) · (𝐴 − 𝐵))) |
| 8 | addmulsub 11671 | . . 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 851 | . 2 ⊢ (𝜑 → ((𝐶 + 𝐷) · (𝐴 − 𝐵)) = (((𝐶 · 𝐴) + (𝐷 · 𝐴)) − ((𝐶 · 𝐵) + (𝐷 · 𝐵)))) |
| 10 | 4, 1 | mulcomd 11225 | . . . 4 ⊢ (𝜑 → (𝐶 · 𝐴) = (𝐴 · 𝐶)) |
| 11 | 5, 1 | mulcomd 11225 | . . . 4 ⊢ (𝜑 → (𝐷 · 𝐴) = (𝐴 · 𝐷)) |
| 12 | 10, 11 | oveq12d 7428 | . . 3 ⊢ (𝜑 → ((𝐶 · 𝐴) + (𝐷 · 𝐴)) = ((𝐴 · 𝐶) + (𝐴 · 𝐷))) |
| 13 | 4, 2 | mulcomd 11225 | . . . 4 ⊢ (𝜑 → (𝐶 · 𝐵) = (𝐵 · 𝐶)) |
| 14 | 5, 2 | mulcomd 11225 | . . . 4 ⊢ (𝜑 → (𝐷 · 𝐵) = (𝐵 · 𝐷)) |
| 15 | 13, 14 | oveq12d 7428 | . . 3 ⊢ (𝜑 → ((𝐶 · 𝐵) + (𝐷 · 𝐵)) = ((𝐵 · 𝐶) + (𝐵 · 𝐷))) |
| 16 | 12, 15 | oveq12d 7428 | . 2 ⊢ (𝜑 → (((𝐶 · 𝐴) + (𝐷 · 𝐴)) − ((𝐶 · 𝐵) + (𝐷 · 𝐵))) = (((𝐴 · 𝐶) + (𝐴 · 𝐷)) − ((𝐵 · 𝐶) + (𝐵 · 𝐷)))) |
| 17 | 7, 9, 16 | 3eqtrd 2802 | 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 1570 ∈ wcel 2143 (class class class)co 7410 ℂcc 11093 + caddc 11098 · cmul 11100 − cmin 11436 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5257 ax-nul 5269 ax-pow 5336 ax-pr 5404 ax-un 7732 ax-resscn 11152 ax-1cn 11153 ax-icn 11154 ax-addcl 11155 ax-addrcl 11156 ax-mulcl 11157 ax-mulrcl 11158 ax-mulcom 11159 ax-addass 11160 ax-mulass 11161 ax-distr 11162 ax-i2m1 11163 ax-1ne0 11164 ax-1rid 11165 ax-rnegex 11166 ax-rrecex 11167 ax-cnre 11168 ax-pre-lttri 11169 ax-pre-lttrn 11170 ax-pre-ltadd 11171 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-br 5110 df-opab 5174 df-mpt 5193 df-id 5556 df-po 5569 df-so 5570 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-riota 7367 df-ov 7413 df-oprab 7414 df-mpo 7415 df-er 8690 df-en 8940 df-dom 8941 df-sdom 8942 df-pnf 11240 df-mnf 11241 df-ltxr 11243 df-sub 11438 |
| This theorem is referenced by: constrrtlc1 34122 |
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