|x+y+4|+〔x-2〉²=0,则3x+2y=多少.
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|x+y+4|+〔x-2〉²=0,则3x+2y=多少.
|x+y+4|+〔x-2〉²=0,则3x+2y=多少.
|x+y+4|+〔x-2〉²=0,则3x+2y=多少.
非负整式相加得0,两个都等于0所以
x+y+4=0
x-2=0
x=2
y=-6
3x+2y=-6
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