∵|x-2|+(y+3)2=0,∴|x-2|=0,(y+3)2=0,∴x=2,y=-3, 1 2 x?2(x? 1 3 y2)+(? 3 2 x+ 1 3 y2)= 1 2 x-2x+ 2 3 y2- 3 2 x+ 1 3 y2=-3x+y2,将x=2,y=-3代入原式=-3×2+(-3)2=-6+9=3.