Question

因式分解：（x+y-z）^2-（x-y+z）^2

Answer 1

原始=(x+y-z+x-y+z)(x+y-z-x+y-z)

=2x*(2y-2z)

=4xy-4xz

另一种做法：

原式=[(x-y+z)-(x+y-z)]*[(x-y+z)+(x+y-z)]

=(2z-2y)*(2x)

=4x(z-y)

=4xz-4xy

满意请采纳、、谢谢!