若xy=3,x^2+y^2=10,求x+y与x-y的值
若(y-x)/xy=3,求分式(2x+3xy-2y)/(x-2xy-y)的值
若x+y-5xy=0,求(2x-3xy+2y)/(x+2xy+y)的值
已知3x*+xy-2y*=0,求(x/y)-(y/x)-(x*+y*)/(xy)的值.*是平方
若x-y=4,xy=1,求(-2xy+2x+3y)-(3xy+2y-2x)-(x+4y+xy)的值
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
若1/x-1/y=3 求 2x-3xy-2y/x-2xy-y的值
若1/x-1/y=3,求(2x+3xy-2y)/(x-2xy-y)的值
若1/x-1/y=3,求5x+2xy-5y/x-4xy-y的值
如果x^2+xy+y-14,y^@+xy+x=28,求x+y的值.
若xy=3,x²+y²=10,求x+y与x-y的值
已知x-y/xy=3,求分式2x+3xy-2y/x-2xy-y的值.
已知xy/x+y =3,求2x-3xy+2y/-x+3xy-y 的值.