Question

分解因式 x的平方+y的平方-z的平方-4X方Y方

Answer 1

题目有问题吧,我感觉应该是(x²+y²-z²)²-4x²y²(x²+y²-z²)²-4x²y²=(x²+y²-z²)-(2xy)²=(x²+y²-z²+2xy)(...