若x+2的绝对值+y加3的绝对值等于0,则x等于(-2 ),y等于 (-3 )
∵|x+2|≥0,|y+3|≥0
又∵|x+2|+|y+3|=0
∴x+2=0,y+3=0
∴x=-2,y=-3
2x²-y+1
=8+3+1
=12