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Theorem joinlmuladdmuld 11343
Description: Join AB+CB into (A+C) on LHS. (Contributed by David A. Wheeler, 26-Oct-2019.)
Hypotheses
Ref Expression
joinlmuladdmuld.1 (𝜑 → 𝐴 ∈ ℂ)
joinlmuladdmuld.2 (𝜑 → 𝐵 ∈ ℂ)
joinlmuladdmuld.3 (𝜑 → 𝐶 ∈ ℂ)
joinlmuladdmuld.4 (𝜑 → ((𝐴 · 𝐵) + (𝐶 · 𝐵)) = 𝐷)
Assertion
Ref Expression
joinlmuladdmuld (𝜑 → ((𝐴 + 𝐶) · 𝐵) = 𝐷)

Proof of Theorem joinlmuladdmuld
StepHypRef Expression
1 joinlmuladdmuld.1 . . 3 (𝜑 → 𝐴 ∈ ℂ)
2 joinlmuladdmuld.3 . . 3 (𝜑 → 𝐶 ∈ ℂ)
3 joinlmuladdmuld.2 . . 3 (𝜑 → 𝐵 ∈ ℂ)
41, 2, 3adddird 11341 . 2 (𝜑 → ((𝐴 + 𝐶) · 𝐵) = ((𝐴 · 𝐵) + (𝐶 · 𝐵)))
5 joinlmuladdmuld.4 . 2 (𝜑 → ((𝐴 · 𝐵) + (𝐶 · 𝐵)) = 𝐷)
64, 5eqtrd 2795 1 (𝜑 → ((𝐴 + 𝐶) · 𝐵) = 𝐷)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   = wceq 1569   ∈ wcel 2144  (class class class)co 7424  ℂcc 11205   + caddc 11210   · cmul 11212
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1827  ax-4 1841  ax-5 1942  ax-6 1999  ax-7 2040  ax-8 2146  ax-9 2154  ax-ext 2732  ax-addcl 11267  ax-mulcom 11271  ax-distr 11274
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1572  df-fal 1582  df-ex 1812  df-sb 2099  df-clab 2739  df-cleq 2752  df-clel 2835  df-rab 3413  df-v 3452  df-ss 3897  df-dif 4046  df-un 4150  df-nul 4278  df-if 4482  df-sn 4585  df-pr 4587  df-op 4835  df-uni 4867  df-br 5103  df-iota 6497  df-fv 6551  df-ov 7427
This theorem is used by:  1p1times  11488  div4p1lem1div2  12608  ltdifltdiv  13981  discr1  14390  arisum  16038  bezoutlem3  16723  bezoutlem4  16724  mbfi1fseqlem4  26048  itgmulc2  26163  tangtx  26843  binom4  27187  axcontlem8  29558  zringfrac  34136  constrrtcclem  34416  cos9thpiminplylem2  34465  quadfac  43392  int-rightdistd  45317  sin5tlem4  48058  fmtnorec2lem  48763  joinlmuladdmuli  51080
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