[(x-2y)(x+2y)+4(x-y)^2]÷5y

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/24 10:35:50
[(x-2y)(x+2y)+4(x-y)^2]÷5y[(x-2y)(x+2y)+4(x-y)^2]÷5y[(x-2y)(x+2y)+4(x-y)^2]÷5y=[(x^2-4y^2)+4(x^2-2xy

[(x-2y)(x+2y)+4(x-y)^2]÷5y
[(x-2y)(x+2y)+4(x-y)^2]÷5y

[(x-2y)(x+2y)+4(x-y)^2]÷5y
=[(x^2-4y^2)+4(x^2-2xy+y^2)]÷5y
=(5x^2-8xy)÷5y
=(x^2/y)-(8x/5)

给个采纳,谢谢了!

=[(x^2-4y^2)+4(x^2-2xy+y^2)]÷5y
=(5x^2-8xy)÷5y
=(x^2/y)-(8x/5)=(5x^2-8xy)/5y