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National 5 Maths Formula Sheet with notes and examples

Updated: Apr 6, 2022

There's the National 5 Maths Formula Sheet that you'll find in the SQA exam, and on some websites, and then there's our National 5 Maths Formula Sheet! Ours has been specially made to provide extra support to National 5 Maths students to explain which formulae you need to know and remember and which key areas from the course it is linked to. We've even provided examples from past paper questions where it applies, and of course, the solutions!


Click here for SQA National 5 Maths Past Papers and Marking Instructions


The Quadratic Formula

This formula is used when you are asked to solve a quadratic equation, the clue that you should use this formula; is that you are asked to round your answers, usually to 1 or 2 decimal places. Even if you can solve the quadratic equation by factorising, you can still use this formula to solve, it will give your final values of x.

Occasionally, this formula is used in the non-calculator paper. If so, you may need to leave your answers as surds.

Past paper example with the quadratic formula: