已知13x^2-6xy+y^2-4x+1=0,求(xy-x^2)^3的值.
已知13x^2-6xy+y^2-4x+1=0,求(xy-x^2)^3的值.
已知:x-y=1,xy=-2.求:(-2xy+2x+3y)-(3xy+2y-2x)-(x+4y+xy)的值
.已知:x-y=1,xy=-2.求:(-2xy+2 x+3y)-(3xy+2y-2x)-(x+4y+xy)的值
已知13x^2-6xy+y^2-4x+1=0,求(x^2-xy)^5的值
已知13X^2-6XY+Y^2-4X+1=0,求(XY-X^2)^5的值.
(1)已知x-y=6,xy=4,求xy^-1+x^-1y的值; (2)已知x^2+y^2=3xy且xy≠0,求x^2y^
已知x-y=4xy,求x-2xy-y分之2x+3xy-2y的值!
已知xy/x+y=6,求3x-2xy+3y/-x+3xy-y的值.
已知y-x-2xy=0,求3x+xy-3y/y-xy-x的值
已知y-x-2xy=0,求(3x+xy-3y)\(y-xy-x)的值
已知x+y=4,xy=-2,求代数式3(xy+2y)-(xy-6x)的值
已知x-y=4xy且xy≠0,求代数式-x-2xy+y分之2x+3xy-2y的值