若(3X+2Y-1)²+绝对值【3Y-2X-5】=0则X+Y=( )
若(3X+2Y-1)²+绝对值【3Y-2X-5】=0则X+Y=( )
若3x-1的绝对值+(2y+1)的平方=0,求x-y分之2x²+3y²的值
1、若|x-1|+(y+3)²=0,则x²+y²=
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已知3x²+xy-2y²=0(x≠0,y≠0),求x/y-y/x-x²+y²/x
若2x²+3y²-8x+6y+11=0,则x+y的值
|3x-y+5|+(2x-y+3)²=0 求x=?y=?
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求代数式3x²y+5x-0.5x²y+3.5x²y-2的值,其中x=1/5,y=7
若实数x,y满足2x²+3y²=1,S=3x²-2y²,则S的取值范围是多少
已知x²+y²-4x+6y+13=0,求x²+2y/x²-3y²的值