已知x-3y=0,求2x+y/x²-2xy ×(x-y)的值
已知3x*+xy-2y*=0,求(x/y)-(y/x)-(x*+y*)/(xy)的值.*是平方
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
已知x-3y=0,求(x²-2xy+y²/x-y)-2y的值
已知x-3y=0,求2x+y/x²-2xy ×(x-y)的值
已知x-3y=0,求(2x+y)/(x^2-2xy+y^2)*(x-y)的值
已知x-3y=0,求(2x+y)/(x^2-2xy+y^2)*(x-y)的值.
已知x-3y=0,求(2x+y)(x-y)/x^2-2xy+y^2的值
已知x-3y=0,求2x+y/x-2xy+y乘(x-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^2+y^2+xy-3y+3=0,求y^x的值
已知x/y=3,求x²+2xy-3y²/x²-xy+y²的值