急求!数学因式分解
2016-05-03
展开全部
(1)
= x(x-y)+z(x-y)
= (x-y)(x+z)
(2)
= a(b-c)-b(b-c)
= (b-c)(a-b)
(3)
= (a+b)(a-b)+c(a+b)
= (a+b)(a-b+c)
= x(x-y)+z(x-y)
= (x-y)(x+z)
(2)
= a(b-c)-b(b-c)
= (b-c)(a-b)
(3)
= (a+b)(a-b)+c(a+b)
= (a+b)(a-b+c)
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