6x的平方(x-y)-14y(y-x)的平方-2(y-x)的立方
问题描述:
6x的平方(x-y)-14y(y-x)的平方-2(y-x)的立方
6x²(x-y)-14y(y-x)²-2(y-x)³ 因式分解
答
原式=6x²(x-y)-14y(x-y)²+2(x-y)³=2(x-y)[3x²-7y(x-y)+(x-y)²]=2(x-y)(3x²-7xy+7y²+x²-2xy+y²)=2(x-y)(4x²-9xy+8y²)题目是6x²(x-y)-14y(y-x)²-2(y-x)³后面两个是(y-x)不是(x-y)对(y-x)²=(x-y)²(y-x)³=-(x-y)³采纳吧