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 ...

Look at the National 4 factorising section before continuing. When a question asks you to 'solve' a quadratic equation, this means that you are to find the roots of the quadratic. In other words ...

The standard equation for a parabola is: You may recognize this as a quadratic function; a parabola is a graphic depiction of a quadratic function. In the equation above, a, b and c are constants ...