已知|x-y+3|+(2x+y)^2=0,求4x+3y的值 已知|x-y+3|+(2x+y)^2=0,求4x+3y的值1.已知|x-y-1|+(x+y)^2=0,求2x+3y的值2.已知|x-y+3|+(2x+y)^2=0,求4x+3y的值急
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已知|x-y+3|+(2x+y)^2=0,求4x+3y的值已知|x-y+3|+(2x+y)^2=0,求4x+3y的值1.已知|x-y-1|+(x+y)^2=0,求2x+3y的值2.已知|x-y+3|+
已知|x-y+3|+(2x+y)^2=0,求4x+3y的值 已知|x-y+3|+(2x+y)^2=0,求4x+3y的值1.已知|x-y-1|+(x+y)^2=0,求2x+3y的值2.已知|x-y+3|+(2x+y)^2=0,求4x+3y的值急
已知|x-y+3|+(2x+y)^2=0,求4x+3y的值 已知|x-y+3|+(2x+y)^2=0,求4x+3y的值
1.已知|x-y-1|+(x+y)^2=0,求2x+3y的值
2.已知|x-y+3|+(2x+y)^2=0,求4x+3y的值
急
已知|x-y+3|+(2x+y)^2=0,求4x+3y的值 已知|x-y+3|+(2x+y)^2=0,求4x+3y的值1.已知|x-y-1|+(x+y)^2=0,求2x+3y的值2.已知|x-y+3|+(2x+y)^2=0,求4x+3y的值急
1.x-y-1=0,x+y=0,x=1/2,y=-1/2,2x+3y=1-3/2=-1/2.
2.x-y+3=0,2x+y=0.x=-1,y=2.4x+3y=-4+6=2.
|x-y-1|+(x+y)^2=0
因为|x-y-1|≥0,(x+y)^2≥0
所以x-y-1=0(1)
x+y=0(2)
(1)+(2)=2x-1=0,x=1/2
所以y=-1/2
下面一题目一样的方法
吗,你,明显
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