Key fact The quadratic formula for a quadratic equation in the form of \(ax^2 + bx + c = 0\) is: \(x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}\) Solve \(x^2 + 6x - 12 = 0\) using the quadratic formula.

Using the quadratic formula is another method of solving quadratic equations that will not factorise. You will need to learn this formula, as well as understanding how to use it. Key fact The ...

The standard equation for a parabola is: You may recognize this as a quadratic function ... Plug in the values into the formula, and you get: The parabola's axis of symmetry (x = h) is a vertical ...