若4x^2-4x+9y^2-12y+5=0求6x+2/3y

已知X.x+y.y-4x+2y+5=0,求4X.X-12X Y+9Y.y的值 若4x^2-4x+9y^2-12y+5=0求6x+2/3y 若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y* 若2x-3y=0,求5x+4y/3x-2y 已知x^3+xy^2+x+x^2y+y^3+y=0,求5x-6y/3x+4y的值. 已知x=1/3,y=-1/2,求代数式x-(x+y)+(x+2y)-(x+3y)+(x+4y)-(x+5y)+...-( 已知4x=9y求(1)x+y/y (2)y-x/2x 已知x,y>0 2x+y+3=xy 求5x+4y最小值 若x^5+x^4y+x^4+x+y+1=0,且3x+2y=1,求x,y的值 已知4x^2+y^2-4x-6y+10=0,求(2\3x根号9x+y^2根号x/y^3)-(x^2-5x根号y\x) 拜 x^2+y^2-4x-6y+13=0,求(2/3根号9x+y^2根号x/y^3)-x^2根号1/x-5x根号y/x)的值 若X-2Y+6+（X+Y+12）²=0,求4X+ 5Y的值