Mathematics
Senior High
(a-b)^2がなぜ(a-b) (a-b)になるんですか?
a^2-2ab+b^2かと思いました。
(3) (a+b)x-(a+b)y=(a+b)(x − y) +
(4) (a-b)²+c(b-a)=(a - b)²-c(a - b)
共
ve
·xd·S+ (x) =
(x+2)= (3)
=(ab)(a-b)-c(a-b)
=(a−b){(a−b)-c}
(d-DE)-
=(a-b)(a-b-c))+s
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