x^2-x+y^2+2y+5/4=0 求x^-1+y^0

问题描述:

x^2-x+y^2+2y+5/4=0 求x^-1+y^0

(x²-x+1/4)+(y²+2y+1)=0
(x-1/2)²+(y+1)²=0
所以x-1/2=0,y+1=0
x=1/2,y=-1
所以原式=2+1=3