Theorem adddid 7051

Description: Distributive law (left-distributivity). (Contributed by Mario Carneiro, 27-May-2016.)

Hypotheses

Ref	Expression
addcld.1	⊢ (𝜑 → 𝐴 ∈ ℂ)
addcld.2	⊢ (𝜑 → 𝐵 ∈ ℂ)
addassd.3	⊢ (𝜑 → 𝐶 ∈ ℂ)

Assertion

Ref	Expression
adddid	⊢ (𝜑 → (𝐴 · (𝐵 + 𝐶)) = ((𝐴 · 𝐵) + (𝐴 · 𝐶)))

Proof of Theorem adddid

Step	Hyp	Ref	Expression
1		addcld.1	. 2 ⊢ (𝜑 → 𝐴 ∈ ℂ)
2		addcld.2	. 2 ⊢ (𝜑 → 𝐵 ∈ ℂ)
3		addassd.3	. 2 ⊢ (𝜑 → 𝐶 ∈ ℂ)
4		adddi 7013	. 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ ∧ 𝐶 ∈ ℂ) → (𝐴 · (𝐵 + 𝐶)) = ((𝐴 · 𝐵) + (𝐴 · 𝐶)))
5	1, 2, 3, 4	syl3anc 1135	1 ⊢ (𝜑 → (𝐴 · (𝐵 + 𝐶)) = ((𝐴 · 𝐵) + (𝐴 · 𝐶)))

Syntax hints:   → wi 4   = wceq 1243   ∈ wcel 1393  (class class class)co 5512  ℂcc 6887   + caddc 6892   · cmul 6894

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-distr 6988

This theorem depends on definitions:  df-bi 110  df-3an 887

This theorem is referenced by:  subdi  7382  mulreim  7595  apadd1  7599  conjmulap  7705  cju  7913  flhalf  9144  binom2  9362  binom3  9366  remim  9460  mulreap  9464  readd  9469  remullem  9471  imadd  9477  cjadd  9484