Since, the points A (4, 3) and B (x, 5) are on the circle with centre O (2, 3)
∴ OA = OB [Radii of a circle]
⇒(4 - 2)2 + (3 - 3)2 = (x - 2)2 + (5 - 3)2
⇒ (2)2 + (0)2 = x2 - 4x + 4 + (2)2
⇒ 4 = x2 - 4x + 8
⇒ x2 - 4x + 4 = 0
⇒ (x - 2)2 = 0
⇒ x - 2 = 0
⇒ x = 2 Ans.
Problems Based on Section Formula