Theorem mulbinom2 9589

Description: The square of a binomial with factor. (Contributed by AV, 19-Jul-2021.)

Assertion

Ref	Expression
mulbinom2	|- ( ( A e. CC /\ B e. CC /\ C e. CC ) -> ( ( ( C x. A ) + B ) ^ 2 ) = ( ( ( ( C x. A ) ^ 2 ) + ( ( 2 x. C ) x. ( A x. B ) ) ) + ( B ^ 2 ) ) )

Proof of Theorem mulbinom2

Step	Hyp	Ref	Expression
1		mulcl 7100	. . . . 5 |- ( ( C e. CC /\ A e. CC ) -> ( C x. A ) e. CC )
2	1	ancoms 264	. . . 4 |- ( ( A e. CC /\ C e. CC ) -> ( C x. A ) e. CC )
3	2	3adant2 957	. . 3 |- ( ( A e. CC /\ B e. CC /\ C e. CC ) -> ( C x. A ) e. CC )
4		simp2 939	. . 3 |- ( ( A e. CC /\ B e. CC /\ C e. CC ) -> B e. CC )
5		binom2 9585	. . 3 |- ( ( ( C x. A ) e. CC /\ B e. CC ) -> ( ( ( C x. A ) + B ) ^ 2 ) = ( ( ( ( C x. A ) ^ 2 ) + ( 2 x. ( ( C x. A ) x. B ) ) ) + ( B ^ 2 ) ) )
6	3, 4, 5	syl2anc 403	. 2 |- ( ( A e. CC /\ B e. CC /\ C e. CC ) -> ( ( ( C x. A ) + B ) ^ 2 ) = ( ( ( ( C x. A ) ^ 2 ) + ( 2 x. ( ( C x. A ) x. B ) ) ) + ( B ^ 2 ) ) )
7		mulass 7104	. . . . . . 7 |- ( ( C e. CC /\ A e. CC /\ B e. CC ) -> ( ( C x. A ) x. B ) = ( C x. ( A x. B ) ) )
8	7	3coml 1145	. . . . . 6 |- ( ( A e. CC /\ B e. CC /\ C e. CC ) -> ( ( C x. A ) x. B ) = ( C x. ( A x. B ) ) )
9	8	oveq2d 5548	. . . . 5 |- ( ( A e. CC /\ B e. CC /\ C e. CC ) -> ( 2 x. ( ( C x. A ) x. B ) ) = ( 2 x. ( C x. ( A x. B ) ) ) )
10		2cnd 8112	. . . . . 6 |- ( ( A e. CC /\ B e. CC /\ C e. CC ) -> 2 e. CC )
11		simp3 940	. . . . . 6 |- ( ( A e. CC /\ B e. CC /\ C e. CC ) -> C e. CC )
12		mulcl 7100	. . . . . . 7 |- ( ( A e. CC /\ B e. CC ) -> ( A x. B ) e. CC )
13	12	3adant3 958	. . . . . 6 |- ( ( A e. CC /\ B e. CC /\ C e. CC ) -> ( A x. B ) e. CC )
14	10, 11, 13	mulassd 7142	. . . . 5 |- ( ( A e. CC /\ B e. CC /\ C e. CC ) -> ( ( 2 x. C ) x. ( A x. B ) ) = ( 2 x. ( C x. ( A x. B ) ) ) )
15	9, 14	eqtr4d 2116	. . . 4 |- ( ( A e. CC /\ B e. CC /\ C e. CC ) -> ( 2 x. ( ( C x. A ) x. B ) ) = ( ( 2 x. C ) x. ( A x. B ) ) )
16	15	oveq2d 5548	. . 3 |- ( ( A e. CC /\ B e. CC /\ C e. CC ) -> ( ( ( C x. A ) ^ 2 ) + ( 2 x. ( ( C x. A ) x. B ) ) ) = ( ( ( C x. A ) ^ 2 ) + ( ( 2 x. C ) x. ( A x. B ) ) ) )
17	16	oveq1d 5547	. 2 |- ( ( A e. CC /\ B e. CC /\ C e. CC ) -> ( ( ( ( C x. A ) ^ 2 ) + ( 2 x. ( ( C x. A ) x. B ) ) ) + ( B ^ 2 ) ) = ( ( ( ( C x. A ) ^ 2 ) + ( ( 2 x. C ) x. ( A x. B ) ) ) + ( B ^ 2 ) ) )
18	6, 17	eqtrd 2113	1 |- ( ( A e. CC /\ B e. CC /\ C e. CC ) -> ( ( ( C x. A ) + B ) ^ 2 ) = ( ( ( ( C x. A ) ^ 2 ) + ( ( 2 x. C ) x. ( A x. B ) ) ) + ( B ^ 2 ) ) )

Syntax hints:   -> wi 4   /\ w3a 919   = wceq 1284   e. wcel 1433  (class class class)co 5532   CCcc 6979   + caddc 6984   x. cmul 6986   2c2 8089   ^cexp 9475

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-in1 576  ax-in2 577  ax-io 662  ax-5 1376  ax-7 1377  ax-gen 1378  ax-ie1 1422  ax-ie2 1423  ax-8 1435  ax-10 1436  ax-11 1437  ax-i12 1438  ax-bndl 1439  ax-4 1440  ax-13 1444  ax-14 1445  ax-17 1459  ax-i9 1463  ax-ial 1467  ax-i5r 1468  ax-ext 2063  ax-coll 3893  ax-sep 3896  ax-nul 3904  ax-pow 3948  ax-pr 3964  ax-un 4188  ax-setind 4280  ax-iinf 4329  ax-cnex 7067  ax-resscn 7068  ax-1cn 7069  ax-1re 7070  ax-icn 7071  ax-addcl 7072  ax-addrcl 7073  ax-mulcl 7074  ax-mulrcl 7075  ax-addcom 7076  ax-mulcom 7077  ax-addass 7078  ax-mulass 7079  ax-distr 7080  ax-i2m1 7081  ax-0lt1 7082  ax-1rid 7083  ax-0id 7084  ax-rnegex 7085  ax-precex 7086  ax-cnre 7087  ax-pre-ltirr 7088  ax-pre-ltwlin 7089  ax-pre-lttrn 7090  ax-pre-apti 7091  ax-pre-ltadd 7092  ax-pre-mulgt0 7093  ax-pre-mulext 7094

This theorem depends on definitions:  df-bi 115  df-dc 776  df-3or 920  df-3an 921  df-tru 1287  df-fal 1290  df-nf 1390  df-sb 1686  df-eu 1944  df-mo 1945  df-clab 2068  df-cleq 2074  df-clel 2077  df-nfc 2208  df-ne 2246  df-nel 2340  df-ral 2353  df-rex 2354  df-reu 2355  df-rmo 2356  df-rab 2357  df-v 2603  df-sbc 2816  df-csb 2909  df-dif 2975  df-un 2977  df-in 2979  df-ss 2986  df-nul 3252  df-if 3352  df-pw 3384  df-sn 3404  df-pr 3405  df-op 3407  df-uni 3602  df-int 3637  df-iun 3680  df-br 3786  df-opab 3840  df-mpt 3841  df-tr 3876  df-id 4048  df-po 4051  df-iso 4052  df-iord 4121  df-on 4123  df-suc 4126  df-iom 4332  df-xp 4369  df-rel 4370  df-cnv 4371  df-co 4372  df-dm 4373  df-rn 4374  df-res 4375  df-ima 4376  df-iota 4887  df-fun 4924  df-fn 4925  df-f 4926  df-f1 4927  df-fo 4928  df-f1o 4929  df-fv 4930  df-riota 5488  df-ov 5535  df-oprab 5536  df-mpt2 5537  df-1st 5787  df-2nd 5788  df-recs 5943  df-frec 6001  df-pnf 7155  df-mnf 7156  df-xr 7157  df-ltxr 7158  df-le 7159  df-sub 7281  df-neg 7282  df-reap 7675  df-ap 7682  df-div 7761  df-inn 8040  df-2 8098  df-n0 8289  df-z 8352  df-uz 8620  df-iseq 9432  df-iexp 9476

This theorem is referenced by: (None)