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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 11675. (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 11568 | . . 3 ⊢ (𝜑 → (𝐴 − 𝐵) ∈ ℂ) |
| 4 | submuladdd.3 | . . . 4 ⊢ (𝜑 → 𝐶 ∈ ℂ) | |
| 5 | submuladdd.4 | . . . 4 ⊢ (𝜑 → 𝐷 ∈ ℂ) | |
| 6 | 4, 5 | addcld 11227 | . . 3 ⊢ (𝜑 → (𝐶 + 𝐷) ∈ ℂ) |
| 7 | 3, 6 | mulcomd 11229 | . 2 ⊢ (𝜑 → ((𝐴 − 𝐵) · (𝐶 + 𝐷)) = ((𝐶 + 𝐷) · (𝐴 − 𝐵))) |
| 8 | addmulsub 11675 | . . 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 11229 | . . . 4 ⊢ (𝜑 → (𝐶 · 𝐴) = (𝐴 · 𝐶)) |
| 11 | 5, 1 | mulcomd 11229 | . . . 4 ⊢ (𝜑 → (𝐷 · 𝐴) = (𝐴 · 𝐷)) |
| 12 | 10, 11 | oveq12d 7429 | . . 3 ⊢ (𝜑 → ((𝐶 · 𝐴) + (𝐷 · 𝐴)) = ((𝐴 · 𝐶) + (𝐴 · 𝐷))) |
| 13 | 4, 2 | mulcomd 11229 | . . . 4 ⊢ (𝜑 → (𝐶 · 𝐵) = (𝐵 · 𝐶)) |
| 14 | 5, 2 | mulcomd 11229 | . . . 4 ⊢ (𝜑 → (𝐷 · 𝐵) = (𝐵 · 𝐷)) |
| 15 | 13, 14 | oveq12d 7429 | . . 3 ⊢ (𝜑 → ((𝐶 · 𝐵) + (𝐷 · 𝐵)) = ((𝐵 · 𝐶) + (𝐵 · 𝐷))) |
| 16 | 12, 15 | oveq12d 7429 | . 2 ⊢ (𝜑 → (((𝐶 · 𝐴) + (𝐷 · 𝐴)) − ((𝐶 · 𝐵) + (𝐷 · 𝐵))) = (((𝐴 · 𝐶) + (𝐴 · 𝐷)) − ((𝐵 · 𝐶) + (𝐵 · 𝐷)))) |
| 17 | 7, 9, 16 | 3eqtrd 2808 | 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 1567 ∈ wcel 2149 (class class class)co 7411 ℂcc 11097 + caddc 11102 · cmul 11104 − cmin 11440 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-sep 5261 ax-nul 5271 ax-pow 5337 ax-pr 5405 ax-un 7733 ax-resscn 11156 ax-1cn 11157 ax-icn 11158 ax-addcl 11159 ax-addrcl 11160 ax-mulcl 11161 ax-mulrcl 11162 ax-mulcom 11163 ax-addass 11164 ax-mulass 11165 ax-distr 11166 ax-i2m1 11167 ax-1ne0 11168 ax-1rid 11169 ax-rnegex 11170 ax-rrecex 11171 ax-cnre 11172 ax-pre-lttri 11173 ax-pre-lttrn 11174 ax-pre-ltadd 11175 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-nel 3071 df-ral 3086 df-rex 3096 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-br 5114 df-opab 5178 df-mpt 5197 df-id 5557 df-po 5570 df-so 5571 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-dm 5672 df-rn 5673 df-res 5674 df-ima 5675 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7368 df-ov 7414 df-oprab 7415 df-mpo 7416 df-er 8693 df-en 8943 df-dom 8944 df-sdom 8945 df-pnf 11244 df-mnf 11245 df-ltxr 11247 df-sub 11442 |
| This theorem is referenced by: constrrtlc1 34066 |
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