Now try the example question below. Solve the quadratic equation \({x^2} - 6x + 8\) by completing the table below, plotting the points and drawing the parabola then reading off the roots from the ...

You will need to learn this formula, as well as understanding how to use it. Key fact The quadratic formula for a quadratic equation in the form of ... In this example, \(a = 1\), \(b = 6 ...