|3x+2y-1|+|3y-2x+5|=0
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|3x+2y-1|+|3y-2x+5|=0|3x+2y-1|+|3y-2x+5|=0|3x+2y-1|+|3y-2x+5|=0绝对值大于等于0,相加等于0,若有一个大于0,则另一个小于0,不成立.所以
|3x+2y-1|+|3y-2x+5|=0
|3x+2y-1|+|3y-2x+5|=0
|3x+2y-1|+|3y-2x+5|=0
绝对值大于等于0,相加等于0,若有一个大于0,则另一个小于0,不成立.
所以两个都等于0
所以3x+2y-1=0 (1)
3y-2x+5=0 (2)
(1)*2+(2)*3
4y-2+9y+15=0
y=-1
x=(1-2y)/3=1
|3x+2y-1|+|3y-2x+5|=0
3x+2y-1=0 1
3y-2x+5=0 2
1式*2 6x+4y-2=0 3
2式*3 9y-6x+15=0 4
3式+4式 13y+13=0
y=-1
3x-2-1=0
x=1
x=1 y=-1
x=1,y=-1
|3x+2y-1|≥0 ,|3y-2x+5|≥0
|3x+2y-1|=|3y-2x+5|=0
即3x+2y-1=0,3y-2x+5=0
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