To illustrate, take, as an example, the polynomial 2x2 + 3x – 1. This highest exponent present is the x2, so it is a 2nd order polynomial, and you can use this first method to find the axis of symmetry.
In the example above, a = 2 b = 3, and c = -1. Insert these values into your formula, and you will get:x = -3 / 2(2) = -3/4.
In the example above, the axis of symmetry is -3/4.