来自刘良旭的问题
(x+y+z)^2-(x-y-z)^2因式分解
(x+y+z)^2-(x-y-z)^2因式分解
1回答
2020-01-16 10:24
(x+y+z)^2-(x-y-z)^2因式分解
(x+y+z)^2-(x-y-z)^2因式分解
(x+y+z)^2-(x-y-z)^2=
(x+y+z+x-y-z)(x+y+z-x+y+z)=2x(2y+2z)=4x(y+z)=4xy+4xz