若4x^2+y^2-4x+8y+17=0,则x^y=

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*y)的值 若x-y=1 化简（x+y)(x^2+y^2)(x^4+y^4)(x^8+y^8)(x^16+y^16) 若实数x、y满足x平方+y平方-4x-2y+5=0,求根号8y-2x分之（根号x）+y 若实数X,Y满足x²+y²-4x-2y+5=0求√x+y/√8y-2x x*x+2x+y*y-4y+5=0 x= y= 若4x^2+y^2-4x+8y+17=0,则x^y= 已知x.x+y.y+8x+6y+25=0,求代数式(x.x-4y.y)/(x.x+4xy+4y.y)-x/(x+2y)的值 已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值? {x+y=1 ,xy=-6{x(2x-3)=0,y=x²-1{(3x+4y-3)(3x+4y+3)=0,3x+2y=5{(x-y+2)(x+y)=0,x²+y²=8{(x+y)((x+y-1)=0,(x-y)(x-y-1)=0 [(x+2y)(x-2y)-(x-2y)^2+8y(x+y)]除以4x= 已知x*x+4x+y*y-2y+5=0,则x*x+y*y=? RT,若（√2x-y）+y^2+4y+4=0,求[(x-y)^2+(x+y)(x-y)]÷2x的值 若x y满足x^2+y^2-2x+4y=0求x-2y的最大值 若实数x,y满足x²+y²-2x+4y=0,求x-y的最大值 (x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)= 已知x^2+4y^2-4x+8y+8=0,求x+y 若X+Y=8,(X-Y)^2=4,则X^2+Y^2= 求x ,y 9x^2+4y^2-12x-8y+8=0