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_数学解答

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
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人气：144 ℃　时间：2020-05-10 18:45:20

解答

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.