若x<0,y>0,求+的值

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若x>0x,y<0,求|x-y+2|-|y-x-3|的值

若x>0x,y<0,求|x-y+2|-|y-x-3|的值若x>0x,y<0,求|x-y+2|-|y-x-3|的值若x>0x,y<0,求|x-y+2|-|y-x-3|的值∵x>0,y0,y-x

若(x+y)(x+y-1)-2=0,求x+y的值求

若(x+y)(x+y-1)-2=0,求x+y的值求若(x+y)(x+y-1)-2=0,求x+y的值求若(x+y)(x+y-1)-2=0,求x+y的值求

若x>1,y>0 ,且满足xy=x^y,x/y=x^3y,求x+y的值

若x>1,y>0,且满足xy=x^y,x/y=x^3y,求x+y的值若x>1,y>0,且满足xy=x^y,x/y=x^3y,求x+y的值若x>1,y>0,且满足xy=x^y,x/y=x^3y,求x+y

若x<0,xy<0,求|y-x+1|-|x-y-5| 的值

若x<0,xy<0,求|y-x+1|-|x-y-5|的值若x<0,xy<0,求|y-x+1|-|x-y-5|的值若x<0,xy<0,求|y-x+1|-|x-y-5|的值_4

若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y*y)的值

若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y*y)的值若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(

若X大于0求|X-Y+2|-|y-x-3|的值y小于0

若X大于0求|X-Y+2|-|y-x-3|的值y小于0若X大于0求|X-Y+2|-|y-x-3|的值y小于0若X大于0求|X-Y+2|-|y-x-3|的值y小于0x>0条件不够,y呢?

若x+y=6,xy=2.75,x-y>0,求x-y的值

若x+y=6,xy=2.75,x-y>0,求x-y的值若x+y=6,xy=2.75,x-y>0,求x-y的值若x+y=6,xy=2.75,x-y>0,求x-y的值(x+y)^2=36x^2+y^2+2

若(x+y-5)²+|x-3y-17|-0,求x、y的值

若(x+y-5)²+|x-3y-17|-0,求x、y的值若(x+y-5)²+|x-3y-17|-0,求x、y的值若(x+y-5)²+|x-3y-17|-0,求x、y的值应

若/X+Y-9/+(2X-Y+3)=0求X与Y的值

若/X+Y-9/+(2X-Y+3)=0求X与Y的值若/X+Y-9/+(2X-Y+3)=0求X与Y的值若/X+Y-9/+(2X-Y+3)=0求X与Y的值前边是绝对值么?是的话,有x+y=9,2x-y=-

/x/=2007,/y/=2008,x>0,y<0,求x+y的值

/x/=2007,/y/=2008,x>0,y<0,求x+y的值/x/=2007,/y/=2008,x>0,y<0,求x+y的值/x/=2007,/y/=2008,x>0,y<0,求x+y的值负一

若x>0,y>0,且x-(√xy)-2y=0,求x/y的值

若x>0,y>0,且x-(√xy)-2y=0,求x/y的值若x>0,y>0,且x-(√xy)-2y=0,求x/y的值若x>0,y>0,且x-(√xy)-2y=0,求x/y的值x-(√xy)-2y=0(

若|x+y-1|+(x-y-2)²=0,求代数式(x+2y)(x-2y)-(2x-y)(-y-2x)的值.

若|x+y-1|+(x-y-2)²=0,求代数式(x+2y)(x-2y)-(2x-y)(-y-2x)的值.若|x+y-1|+(x-y-2)²=0,求代数式(x+2y)(x-2y)-

x=y 且x-5>y,求x,y的取值范围 x-y=0

x=y且x-5>y,求x,y的取值范围x-y=0x=y且x-5>y,求x,y的取值范围x-y=0x=y且x-5>y,求x,y的取值范围x-y=0无解.x-y=0x=y,则y-y=0则y-5>Yy-y>

若x+y-8x-10y+41=0,求x/y+y/x的值

若x+y-8x-10y+41=0,求x/y+y/x的值若x+y-8x-10y+41=0,求x/y+y/x的值若x+y-8x-10y+41=0,求x/y+y/x的值谁说做不出来的!X2+Y2-8X-10

若X,Y互为相反数,且(X+Y+3)(X-Y-2)=0,求X,Y的值?

若X,Y互为相反数,且(X+Y+3)(X-Y-2)=0,求X,Y的值?若X,Y互为相反数,且(X+Y+3)(X-Y-2)=0,求X,Y的值?若X,Y互为相反数,且(X+Y+3)(X-Y-2)=0,求X

若x^2+y^2-10x-6y+34=0,求(x-y)/(x+y)的值

若x^2+y^2-10x-6y+34=0,求(x-y)/(x+y)的值若x^2+y^2-10x-6y+34=0,求(x-y)/(x+y)的值若x^2+y^2-10x-6y+34=0,求(x-y)/(x

已知|3x-y|+|x+y|=0,求x-y除以x*y的值.

已知|3x-y|+|x+y|=0,求x-y除以x*y的值.已知|3x-y|+|x+y|=0,求x-y除以x*y的值.已知|3x-y|+|x+y|=0,求x-y除以x*y的值.绝对值项恒非负,两绝对值项

RT,若(√2x-y)+y^2+4y+4=0,求[(x-y)^2+(x+y)(x-y)]÷2x的值

RT,若(√2x-y)+y^2+4y+4=0,求[(x-y)^2+(x+y)(x-y)]÷2x的值RT,若(√2x-y)+y^2+4y+4=0,求[(x-y)^2+(x+y)(x-y)]÷2x的值RT

若下列不等式成立,求x、y的取值范围:1.若x+y>x,则x-------,y---------2.若x y的平方>0,则x--------,y--------- (“x y的平方”指x乘以y的平方)3.若y的平方+1分之x>0,则x--------,y----------4.若(x-1)的平方+

若下列不等式成立,求x、y的取值范围:1.若x+y>x,则x-------,y---------2.若xy的平方>0,则x--------,y---------(“xy的平方”指x乘以y的平方)3.若

若x²-y²=1且x>0,y>0,求x√(1+y²)-y√(x²-1)的值

若x²-y²=1且x>0,y>0,求x√(1+y²)-y√(x²-1)的值若x²-y²=1且x>0,y>0,求x√(1+y²)-y