x^2+y^2=3xy xy≠0 求x^2 y^-2 + x^-2 y^2
已知3x*+xy-2y*=0,求(x/y)-(y/x)-(x*+y*)/(xy)的值.*是平方
若x+y-5xy=0,求(2x-3xy+2y)/(x+2xy+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3x^2+xy-2y^2=0,求{(x+y)/(x-y)+4xy/(y^2-x^2)}/{(x+3y)*(x-y)}
x^2+y^2=3xy xy≠0 求x^2 y^-2 + x^-2 y^2
已知xy≠0,且2x+3xy-2y=0,求(x+y)/(x-y)的值.
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
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
(xy-x^2)乘以(xy)/(x-y)
已知3/(x-y)=1/xy 求(-x-2xy+y)/ (2x+3xy-2y)