The document discusses solving second-degree polynomial equations by completing squares. It begins by reviewing that a second-degree polynomial can be written as ax2 + bx + c = 0. If the equation is not a perfect square trinomial, the technique of completing squares can be used. This involves adding or subtracting the same quantity to both sides of the equation to complete a perfect square of the form (x + p)2 = q. Several examples are worked through step-by-step to demonstrate solving equations using this method.