已知x,y满足y^4+2x^4+1=4x^2y,求x,y的值
已知x,y满足y^4+2x^4+1=4x^2y,求x,y的值
已知x,y满足x(+1)-(x²+2y)=1,求x²+4xy+4y²-2x+4y的值.
已知实数x,y满足方程x^2+y^2-4x-2y+1=0.求x^2+y^2+x+y的最大值和最小值.
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
已知实数x,y满足方程x*x+y*y-4x+1=0.求y-x的最大值
已知正数x,y满足2x+3y=4,求2/x+1/y的最小值,并求此时相应的x,y的值
已知4x=9y求(1)x+y/y (2)y-x/2x
1.已知x:y=2:3,且2x+y/2-1=x-y/3,求x,y的值.2.已知x,y的值满足等式x+1/2=y+3/4=
已知非零有理数x,y满足x²-4xy+4y²=0,求x-y/x+y-y-x/x+y的值.
已知x,y满足(2x+3y+1)的平方+|4x-9y-8|=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 根号2x-3y-1+ |x-2y+2| =0,求4x -5分之4y的值