x(x+y)(x-y)-x(x+y)的二次方,提公因式
人气:353 ℃ 时间:2020-05-19 08:52:22
解答
x(x+y)(x-y)-x(x+y)²
=x(x+y)(x-y-x-y)
=-2xy(x+y)可以再详细吗x(x+y)(x-y)-x(x+y)²=x(x+y)[(x-y)-(x+y)]=x(x+y)(x-y-x-y)=x(x+y)*-2y=-2xy(x+y)
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