分解因式,1、-2x+4x²-2x³ 2、9(x-y)²-4(x+y)²
问题描述:
分解因式,1、-2x+4x²-2x³ 2、9(x-y)²-4(x+y)²
答
1.-2x(x-2)^2
2.[3(x-y)+2(x+y)][3(x-y)-2(x+y)]=(5x-y)(x-5y)