已知x,y满足x^2+y^2-4x-6y+13=0,求(-y/x^3)^3/(-1/xy)^4*(x/y^2)^2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x,y满足x^2+y^2-4x-6y+13=0,求(-y/x^3)^3/(-1/xy)^4*(x/y^2)^2的值.
已知实数xy满足x^2+y^2-6x+4y+13=0求x^y的值
已知实数x,y满足5x^2-3xy+1\2y^2-2x+1\2y+1\4=0,求x,y的值
已知实数x、y满足5x²-3xy+1/2y²-2x+1/2y+1/4=0 求x、y的值
已知x.y满足x^2+y^2-4x-6y+13=0,求(-y/x^2)^3除以(-1/xy)^4乘(x/y^2)^2的值
已知x^3+xy^2+x+x^2y+y^3+y=0,求5x-6y/3x+4y的值.
已知x、y满足:x平方-4xy+4y平方-5(x-2y)=3,求2x-4y的值
已知实数x,y满足关系式│x+y-3│+根号(xy-6)=0,求代数式(x+2y)/y-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)}
已知3x*+xy-2y*=0,求(x/y)-(y/x)-(x*+y*)/(xy)的值.*是平方
已知x^2+3xy-4y^2=0(y≠0),求x-y/x+y的值.