已知丨x-y+5丨+(x+3)²=0,则3x+2y=?

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已知丨x-y+5丨+(x+3)²=0,则3x+2y=?已知丨x-y+5丨+(x+3)²=0,则3x+2y=?已知丨x-y+5丨+(x+3)²=0,则3x+2y=?x-y+

已知丨x-y+5丨+(x+3)²=0,则3x+2y=?
已知丨x-y+5丨+(x+3)²=0,则3x+2y=?

已知丨x-y+5丨+(x+3)²=0,则3x+2y=?
x-y+5=0
x+3=0
∴x=-3
y=2
∴3x+2y=-9+4=-5

由题得x+3=0 x=-3
x-y+5=0 y=2
3x+2y=-5