x(x+y)(x-y)-x(x+y)的二次方,提公因式

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x(x+y)(x-y)-x(x+y)的二次方,提公因式x(x+y)(x-y)-x(x+y)的二次方,提公因式x(x+y)(x-y)-x(x+y)的二次方,提公因式x(x+y)(x-y)-x(x+y)&

x(x+y)(x-y)-x(x+y)的二次方,提公因式
x(x+y)(x-y)-x(x+y)的二次方,提公因式

x(x+y)(x-y)-x(x+y)的二次方,提公因式
x(x+y)(x-y)-x(x+y)²
=x(x+y)(x-y-x-y)
=-2xy(x+y)