已知x,y是实数,且满足4x²-4x+根号y-6=-1,求x-y的值

已知x,y是实数,且满足4x²-4x+根号y-6=-1,求x-y的值
已知x,y是实数,且满足4x²-4x+根号y-6=-1,求x-y的值

已知x,y是实数,且满足4x²-4x+根号y-6=-1,求x-y的值
且满足4x²-4x+根号y-6=-1 (2x+1)²-4x+根号y-6=0 2x+1=0 y-6=0
x=-1/2 y=6 x-y=-1/2-6=-13/2

4x²-4x+√y-6=-1
4x²-4x+1+√y-6=0
(2x-1)²+√y-6=0
2x-1=0, y-6=0
x=0.5, y=6
x-y=0.5-6=-5.5