Theorem muladdi 8366

Description: Product of two sums. (Contributed by NM, 17-May-1999.)

Hypotheses

Ref	Expression
mulm1.1	|- A e. CC
mulneg.2	|- B e. CC
subdi.3	|- C e. CC
muladdi.4	|- D e. CC

Assertion

Ref	Expression
muladdi	|- ( ( A + B ) x. ( C + D ) ) = ( ( ( A x. C ) + ( D x. B ) ) + ( ( A x. D ) + ( C x. B ) ) )

Proof of Theorem muladdi

Step	Hyp	Ref	Expression
1		mulm1.1	. 2 |- A e. CC
2		mulneg.2	. 2 |- B e. CC
3		subdi.3	. 2 |- C e. CC
4		muladdi.4	. 2 |- D e. CC
5		muladd 8341	. 2 |- ( ( ( A e. CC /\ B e. CC ) /\ ( C e. CC /\ D e. CC ) ) -> ( ( A + B ) x. ( C + D ) ) = ( ( ( A x. C ) + ( D x. B ) ) + ( ( A x. D ) + ( C x. B ) ) ) )
6	1, 2, 3, 4, 5	mp4an 427	1 |- ( ( A + B ) x. ( C + D ) ) = ( ( ( A x. C ) + ( D x. B ) ) + ( ( A x. D ) + ( C x. B ) ) )

Syntax hints:   = wceq 1353   e. wcel 2148  (class class class)co 5875   CCcc 7809   + caddc 7814   x. cmul 7816

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-ext 2159  ax-addcl 7907  ax-mulcl 7909  ax-addcom 7911  ax-mulcom 7912  ax-addass 7913  ax-distr 7915

This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-nf 1461  df-sb 1763  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-rex 2461  df-v 2740  df-un 3134  df-sn 3599  df-pr 3600  df-op 3602  df-uni 3811  df-br 4005  df-iota 5179  df-fv 5225  df-ov 5878

This theorem is referenced by: (None)