(x—3)^2与|y+2|互为相反数,求xy/x+y的值
问题描述:
(x—3)^2与|y+2|互为相反数,求xy/x+y的值
答
解析
(x-3)²+|y+2|=0
x=3
y=-2
所以
xy/(x+y)
=-6/1
=-6