2xy-x²-y² (a-1)+b²(1-a) x的五次方-x

问题描述:

2xy-x²-y² (a-1)+b²(1-a) x的五次方-x
因式分解

2xy-x²-y² =-(x²-2xy+y²)=-(x-y)²(a-1)+b²(1-a)=(a-1)-b²(a-1)=(a-1)(1-b²)=(a-1)(1+b)(1-b) x的五次方-x=x(x的4次方-1)=x(x²-1)(x²+1)=x(x-1)(x+1)(x²+1...