Hi friends I am sticking in solving a parabola equation. Please help me in solving this issue. The problem is as follows - I have given three points which are as follows - [Broken] These points are lying on a parabola whose equation is Y2 = 4AX If these points are lying on this parabola hence will satisfy its equation. Hence Placing all the points in the equation Y2 = 4AX [Broken] Solving these equations I'll get - [Broken] But friends the problem is that, when I am solving these equations in different manner - - - [Broken] I am getting the wrong answer. The previous answer was right i.e. a√7 / 2. Why this is happening. Please friends help me in finding this issue. Thank you all very much in advance.