若|x+y+4|+(x-y+2)²=0,则3x+2y=( )
1个回答
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
相关问题
若(2x+y)2+3(2x+y)-4=0,则2x+y=______.
若|x-2y|+(y-1)2=0,则3x+4y=_____.
1若x+2y=0,则5x+4y/3x-2y=___
1 .若x²+2y²+2x-4y+3=0 则x除以y=___________
若实数x,y满足(x-2y-2)(3x+2y+2)+2(x2+4)=0,则x=____,y=____
若3X^2-XY-4Y^2=0,则X\Y=?
若(3x-y-6)²+2x+y-4绝对值=0,则x= ,y= .
1.若 2x+y=0 ,则代数式4x^3+2xy[x+y]+y^3=[ ]
若|x-y+2|+(x-4)²=0则x+2y=
若[x-y+3]+|2x+y|=0,则x+y=?