x²-4x+y²+10y+29,则y^x=?
已知x,y满足x²+y²-4x+6y+13=0则(3x+y)²-(3x+y)(3x-y)的
已知x/y=2,求2x(x+y)-y(x+y)/4x²-4xy+y²
已知2x-y=10,求式子[(x^2+y^2)-(x-y)^2+2y(x-y)]/4y (4xy-2y²)/4
(2x-y)²-4(x-y)(x+2y)
化简:(2x-y)²-4(x-y)(x+y)
已知:x²y²-2x+6y+10=0则x+y=
x²-2x+y²+6y+10=0,则x+y=?
已知x+y=4,x²-y²=20,则x-y=?
已知x²+4x+y²-2y+5=0,则x+y=
x²+4y²-2x+12y+10=0求X,Y值
(x+y)²+4(x+y)-5
已知x²+y²+5=2x+4y,求【2x²-(x-y)(x-y)】【(x+y-1)(x-y