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因式分解3(x-y)³-(x-y)²=(ⅹ-y)²[3(ⅹ-y)-1]这是为什么?(分解因式:x³y²(x-y)³-x²y³(y-

因式分解3(x-y)³-(x-y)²=(ⅹ-y)²[3(ⅹ-y)-1]这是为什么?(分解因式:x³y²(x-y)³-x²y³(y-x)³)

分解因式:x³y²(x-y)³-x²y³(y-x)³

原式=x2y2(x(x-y)3--y(y-x)3 )

=x2y2(x(x-y)3+y(x-y)3)

=x2y2(x+y)(x-y)3

其实(x-y)3还可以分解,但是一般用不着了,看具体题目的

亲、满意请采纳哦

分解因式x²-y²-x-y,谢谢

平方差公式 x²-y²=(x+y)*(x-y) x²-y²-x-y= (x+y)*(x-y)-(x+y)

提取x+y 原式=(x+y)(x-y-1)

因式分解(x²+y²)²-x²y²

(x²+y²)²-x²y²

=(x²+y²+xy)(x²+y²-xy)

因式分解x³-x²y-xy²-3y

解析:

x³-x²y-xy²+y³

=(x³+y³)-(x²y+xy²)

=(x+y)(x²-xy+y²)-xy(x+y)

=(x+y)(x²-2xy+y²)

=(x+y)(x-y)²