求因式分解(x-y)²-2(x-y)³和(x+y)(x-y)-x(x-y)
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求因式分解(x-y)²-2(x-y)³和(x+y)(x-y)-x(x-y)
(x-y)²-2(x-y)³
=(x-y)(1-2x+2y)
(x+y)(x-y)-x(x-y)
=(x-y)(x+y-x)
=y(x-y)
再问: 帮帮忙啊,还有几题,有点多,别介啊。偶会给你加分的…… a(x+y)²(x-y)-3a(x+y)² (a-b²)-2(b-a)² -x(a-b)-(b-a)² 2a(a-b)²-2b(b-a)³ xy(x+n)²-x(n+m)³。
=(x-y)(1-2x+2y)
(x+y)(x-y)-x(x-y)
=(x-y)(x+y-x)
=y(x-y)
再问: 帮帮忙啊,还有几题,有点多,别介啊。偶会给你加分的…… a(x+y)²(x-y)-3a(x+y)² (a-b²)-2(b-a)² -x(a-b)-(b-a)² 2a(a-b)²-2b(b-a)³ xy(x+n)²-x(n+m)³。
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