分解因式x(x-y)²-2y(y-x)
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分解因式x(x-y)²-2y(y-x)
分解因式x(x-y)²-2y(y-x)
分解因式x(x-y)²-2y(y-x)
x(x-y)²-2y(y-x)
=x(x-y)²+2y(x-y)
=(x-y)[x(x-y)+2y]
=(x-y)(x²-xy+2y)
x(x-y)²-2y(y-x)=x(x-y)²+2y(x-y)=(x-y)[x(x-y)+2y]=(x-y)(x2-xy+2y)
(xy-x^2-2*y)(y-x)