(x-2y+3z)(x-3z-2y)=

来源:学生作业帮助网 编辑:六六作业网 时间:2025/02/04 06:39:30
(x-2y+3z)(x-3z-2y)=(x-2y+3z)(x-3z-2y)=(x-2y+3z)(x-3z-2y)=解(x-2y+3z)(x-3z-2y)=[(x-2y)+3z][(x-2y)-3z]=

(x-2y+3z)(x-3z-2y)=
(x-2y+3z)(x-3z-2y)=

(x-2y+3z)(x-3z-2y)=

(x-2y+3z)(x-3z-2y)
=[(x-2y)+3z][(x-2y)-3z]
=(x-2y)²-(3z)²
=x²-4xy+4y²-9z²

x^2 -3xz -2xy -2xy +6yz +4y^2 +3xz -9z^2 -6yz
=x^2 - 4xy +4y^2 -9z^2

(x-2y+3z)(x-3z-2y)
=((x-2y)+3z)((x-2y)-3z)
=(x-2y)²-(3z)²
=x²-4xy+4y²-9z²
记得采纳哦!~~~~~~~