Ответ:
1) =c(a+b)+d(b+a)=(c+d)(a+b)
2) =x(y+3)-2(3+y)=(y+3)(x-2)
3) =2b(a-c)-c(-c+a)=(a-c)(2b-c)
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Ответ:
1) =c(a+b)+d(b+a)=(c+d)(a+b)
2) =x(y+3)-2(3+y)=(y+3)(x-2)
3) =2b(a-c)-c(-c+a)=(a-c)(2b-c)