If the middle point of a chord of the circle x2+y2+x−y−1=0 be (1,1), then the length of the chord is

If the middle point of a chord of the circle x2+y2+x−y−1=0 be (1,1

1.	If the middle point of a chord of the circle x2+y2+x−y−1=0 be (1,1), then the length of the chord is
Answer» If the middle point of a chord of the circle $x^{2} + y^{2} + x - y - 1 = 0$ be (1,1), then the length of the chord is