Can someone explain how to work the perfect square method? step by step !

If the given quadratic equation is not a perfect square, then we need to make that as a perfect square. To make any quadratic expression as a perfect square, we need to use the method of completing the square as listed:- 1) Check for the following for the given quadratic equation, ax2 + bx + c = 0. (a)    If the given quadratic equation has the coefficient of x2 term as 1, then proceed to step (c).  (b)   If the coefficient of x2 is not 1, then make it 1 by dividing both the sides of the equation by the coefficient. (c)    Isolate the x and x2 terms on one side and the constants on the other side of the equation. 2) Divide the co-efficient of x by 2 (That is b/2 ). 3) Find the square of b/2 (That is (b/2)2). 4) Add the resultant number (b/2)2 to both sides of the given equation and simplify it.