已知(x+2)^2+|x+y+5|=0,求3x^2y+{-2X^2y-[-2xy+(x^2y-4x^2)]-xy}

首页/题库/291℃/2024-07-08 19:09:36

已知(x+2)^2+|x+y+5|=0,求3x^2y+{-2X^2y-[-2xy+(x^2y-4x^2)]-xy}

解释一下吧!

优质解答：

x+2=0,x+y+5=0

x=-2,y=-3

3x^2y+{-2X^2y-[-2xy+(x^2y-4x^2)]-xy}

=3x^2y-2X^2y+2xy-x^2y+4x^2-xy

=4x^2+xy

=4*4+6

=22

我来回答修改/报错/举报内容！

猜你喜欢