|2x+1|+(3x+2y-5/2)的平方=0,则(xy)的2004次方=___

[(x+2y)(x-2y)-(2x-y)²+(3x-y(2x-5y)]/(-x)的解答 若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值 (x+2y)(x-2y)-(2x-y)的平方+(3x-y)(2x-5y)其中x=-1 y=13分之1 化简 x-[y-2x-(x-y) -9-4[2x-5(x+1)] 2x-3{y-[3x-(2y-x)]-2x}过程一步一步的列好x-[y-2x-(x-y) -9-4[2x-5(x+1)] 2x-3{y-[3x-(2y-x)]-2x} (x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5) { (x+y)/5+(x-y)/2=3 (x+y)/5-(x-y)/2=1的答案是多少, 分式的加减:[(x/y-y/x)除以（x+y）+x（1/y-1/x)]除以1+x/y,其中x=5,y=2 {(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=? 先化简再求值(x-y)(x+y)-(x-2y) 的完全平方+x(3x-5y)-(x-y)(x-2y),其中x=1/2 y=-1/2 已知x=1/3,y=-1/2,求代数式x-(x+y)+(x+2y)-(x+3y)+(x+4y)-(x+5y)+...-(x+2009y)的值. 已知x=1/3,y=-1/2,求代数式x-(x+y)+(x+2y)-(x+3y)+(x+4y)-(x+5y)+...-(x+2009y)的值. 5x=3y,(2x+y)的平方=5x(x+y)+9 已知x-y=1,求[(x+2y)^2+(2x+y)(x-4y)-3(x+y)(x-y)]除以y的值大神们帮帮忙 已知x-y=1,求[(x+2y)²+(2x+y)(x-4y)-3(x+y)(x-y)]÷y的值 1、(-y^3)^5/y^3/ y^2+2(-y)^102、(x-y)^7/(y-x)^6+(x+y)^3/(x+y)^23、已知X^a=5,x^b=3,求X^(3a-2b)的值 [(x减2y)的2次方-(x+y)(3x-y)-5y的2次方]*(2x)其中x=-2y=1快地 (x-6)×(x-3) (x+2/1)×(x-3/1)(3x+2)×(x+2) (4y-1)×(y-5) (x-2)×(x的2次方+4) (x-y)×(x的2次方+xy+y的2次方) 若x^5+x^4y+x^4+x+y+1=0,且3x+2y=1,求x,y的值