Step (i) Divide each side by a which is 4 (so that the coefficient of the x2 is 1)
Step (ii) Rewrite the equation with the constant term (ie. 'c') on the right side.
[No need in this example]
Step (iii) Complete the square by adding the square of one-half of the coefficient of x to both sides, that is `(b/2)^2`.
Step (iv) Write the left side as a square and simplify the right side.
Step (v) Equate and solve
This gives `x=3/4` or `x=-1`.
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