Factor the left side and combine the right side. Steps on How to Derive the Quadratic Formula Step 1. The solutions of this equation are called roots of the cubic function defined by the left-hand side of the equation.
About the quadratic formula.
Taking the square root of both sides and isolating x gives. The quadratic formula is derived from a quadratic equation in standard form when solving for x by completing the square. B b 2 4 a c. See examples of using the formula to solve a variety of equations.