(x+2y+5)^2+|2x-y-3|=0则x=

问题描述:

(x+2y+5)^2+|2x-y-3|=0则x=

∵﹙x+2y+5﹚²≥0
|2x‐y‐3|≥0
又:﹙x+2y+5﹚²+|2x-y-3|=0
∴ x+2y+5=0
2x-y-3=0
解得:x=1/5
y=﹣13/5.