(a+b)(x+y)-(a+b)(x-y)分解因式

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(a+b)(x+y)-(a+b)(x-y)分解因式(a+b)(x+y)-(a+b)(x-y)分解因式(a+b)(x+y)-(a+b)(x-y)分解因式分解为ax+ay+bx+by-ax+ay-bx+b

(a+b)(x+y)-(a+b)(x-y)分解因式
(a+b)(x+y)-(a+b)(x-y)分解因式

(a+b)(x+y)-(a+b)(x-y)分解因式
分解为ax+ay+bx+by-ax+ay-bx+by
=ay+by+ay+by
=2ay+2by
=2y(a+b)

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