(a+b)(x+y)-(b+a)(y-x)因式分解快

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(a+b)(x+y)-(b+a)(y-x)因式分解快(a+b)(x+y)-(b+a)(y-x)因式分解快(a+b)(x+y)-(b+a)(y-x)因式分解快(a+b)(x+y)-(b+a)(y-x)=

(a+b)(x+y)-(b+a)(y-x)因式分解快
(a+b)(x+y)-(b+a)(y-x)因式分解

(a+b)(x+y)-(b+a)(y-x)因式分解快
(a+b)(x+y)-(b+a)(y-x)
=(a+b)(x+y)+(a+b)(x-y)
=(a+b)[(x+y)+(x-y)]
=(a+b)(x+y+x-y)
=2x(a+b)

(a+b)(x+y-y+x)
=2x(a+b)