若x+y=6,xy=2.75,x-y>0,求x-y的值
若x+y=6,xy=2.75,x-y>0,求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?
若x+y-5xy=0,求(2x-3xy+2y)/(x+2xy+y)的值
已知x的平方+y的平方-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
已知3x*+xy-2y*=0,求(x/y)-(y/x)-(x*+y*)/(xy)的值.*是平方
若xy-z不等于0,且(y+x)/x=(z+x)/y=(y+x)/z,求[(y+z)(z+x)(x+y)]/xyz的值?
x^2-2xy+y^2+6y+10=0求x,y的值.
若x平方-2xy+y平方-x+y-6=0,求x-y+4的值
若有理数X、Y满足x²-4x+y²+6y+13=0,求xy的值
已知x>0,y>0,且x+6y=5根号xy,求(2x+根号xy-y)分之(x+根号xy+2y)的值
若x+y=5,xy=6,求x^2y+xy^2的值
若x,y满足x^+2y^-2xy+1=0,求xy的值