(a-b)(x-y)-(b-a)(x+y)因式分解

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

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

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

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

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