若|x+y+4|+(x-y+2)²=0,则3x+2y=( )
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若|x+y+4|+(x-y+2)²=0,则3x+2y=()若|x+y+4|+(x-y+2)²=0,则3x+2y=()若|x+y+4|+(x-y+2)²=0,则3x+2y=
若|x+y+4|+(x-y+2)²=0,则3x+2y=( )
若|x+y+4|+(x-y+2)²=0,则3x+2y=( )
若|x+y+4|+(x-y+2)²=0,则3x+2y=( )
解析
绝对值大于等于0
∴x+y+4=0①
x-y+2=0②
∴①+②
x+y+x-y+6=0
2x=-6
x=-3
y=-1
3x+2y=3*-3+2*-1=-9+-1=-10