已知x、y满足(x+1)^2+|y-2|=0,求代数式 2xy X 5x^2y+(1/2x^2y^2-3y) X 2x+
已知x+y=-1,xy=-2,求代数式-5(x+y)+(x-y)+x(xy+y)的值
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
已知x、y满足(x+1)^2+|y-2|=0,求代数式 2xy X 5x^2y+(1/2x^2y^2-3y) X 2x+
已知实数x,y满足x²+y²-xy+2x-y+1=0 求x y
已知x+y=-1,xy=-2,求代数式-5(x+y)+(x-y)+2(xy+y)的值
已知X+Y=-1,xy=-2,求代数式-5(x+y)+(x-y)+(xy+y)的值
已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y
已知x=1/3,y=-1/2,求代数式x-(x+y)+(x+2y)-(x+3y)+(x+4y)-(x+5y)+...-(
已知x^2-3y^2=2xy(x>0,y>0),求代数式x+2y/x-y
已知xy/x+y=2,求代数式3x-5y+3y/-x+3xy-y
已知xy满足(x+1)^2+y-2=0 求代数式-2xy+(1/2x^2y^2-3y)*2x+6xy
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*