xy≠0且3x^-2xy-8y=0求x/y的值
已知x-y=4xy且xy≠0,求代数式-x-2xy+y分之2x+3xy-2y的值
已知xy≠0,且2x+3xy-2y=0,求(x+y)/(x-y)的值.
已知xy≠0,且3x²-2xy-8y²=0,求x/y的值
已知,xy≠0,且3x²-2xy-8y²=0,求x/y的值
已知x^2-xy+3y^2=0 且xy不等于0 求x/y+y/x 的值
已知 xy不等于0且 3x^2 - 2xy - 8y^2=0求x/y的值!
已知xy不等于0,且3x² -2xy-8y²=0,求x/y的值
已知xy不等于零,且3x^2-2xy-8y^2=0,求x/y的值
已知xy≠0,且3x²-2xy-8y²=0,求x/y+y/x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-7y=0,且y≠0,求2x²﹢xy-3y²分之x²-3xy+y²的值
已知x-3y=0,且xy不等于0,求分式x*2-xy+y*2/x*2+xy+y*2的值