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 ...

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When asked to solve a quadratic equation, we are really finding the roots – where the parabola cuts the x-axis, therefore when we have the graph drawn, it is very easy to do this. Looking at the ...