若3X+2Y=0(XY≠0)则代数式2X+3Y/2X-3Y=
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,则代数式3x-5y+8y/-x+3xy-y的值
已知xy/x+y=1/2,则代数式3x-5xy+3y/-x+3xy-y=
己知x平方+3xy一4y平方=0(y≠0)求代数式(1)y分之x(2)x+y分之x一y
已知y=3xy+x,求代数式2x+5xy-2y/x-2xy-y的值(xy≠0)
已知x-y=4xy且xy≠0,求代数式-x-2xy+y分之2x+3xy-2y的值
已知2x+3y=0,求代数式1.5x+4y/3x-2y 2.x²+xy-y²/x²-xy+
若实数x,y满足根号x-2 +(3-y)^2=0,则代数式xy-x的值为
已知:x-2xy-8y=0(x≠0,y≠0),则代数式2x+3y/2y=
设|X-2|+(Y+1/4)^2=0,试求代数式X^2(X^2-XY+Y)-X(X^3-2X^2Y+XY-1)
若(3xy+2)+|7-x-y|=0,求代数式(5xy+10y)-[-5x-(4xy-2y+3x)]的值.
若3X+2Y=0(XY≠0)则代数式2X+3Y/2X-3Y=