Question

（Z的平方—X的平方—Y的平方）的平方—4乘以X的平方乘以Y的平方 因式分解

Answer 1

1、

=(z²-x²-y²)²-(2xy)²

=(z²-x²-y²+2xy)(z²-x²-y²-2xy)

=[z²-(x²-2xy+y²)][z²-(x²+2xy+y²)]

=[z²-(x-y)²][z²-(x+y)²]

=(z-x+y)(z+x-y(z-x-y)(z+x+y)

2、

=(ab-2)(ab-5)