XY=6,X+Y=18,X/Y=?
xy+x-y=18,x,y各等于几
已知xy=-2,x-y=3,求(x+y)(x-y)-y^2+(x-y)^2-(6x^2y-2xy^2)÷2y
已知x的平方+y的平方-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
已知x²+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
解方程x*x+xy=y+y*y
已知xy/x+y=6,求3x-2xy+3y/-x+3xy-y的值.
已知xy=-2,x-y=3,求(x+y)(x-y)-y²+(x-y)²-(6x²y-2xy
x^+2xy+y^+4=16 x^-2xy+y^=16 求(3xy+6y^)+|x^-(2xy+2y^-3x^)|的值
已知x-y=3xy,且xy不等于0,则-3x+6xy+3y/(7x-5y)-9xy-(3x-y)
已知:x/y=-2,求x^2-2xy-3y^2/x^-6xy
1.x-y=16,xy=6,求3x²y-6xy²+18y+6
7.X*X+2X+Y*Y-6Y+10=0,则xy=?