• Home
  • GCSE Topic Tests
  • GCSE Quick Maths Tests
  • Past Papers
  • Join our Newsletter
  • Blog

3 Minute Maths

GCSE maths walkthrough videos and worksheets

  • Maths and English Tutoring
  • Useful maths resources
  • THE ULTIMATE MATHS SURVIVAL GUIDE
  • Visit our Amazon store

Quadratic formula ‘show that’ questions GCSE level 7

December 3, 2017 by Simon Deacon Leave a Comment

Quadratic Formula

Quadratic formula questions …

… are usually something along the lines of:

solve 2x2 – 5x – 6 = 0

and you are asked to ‘give your answer to 2 decimal places.’ This usually means that you will need to use the quadratic formula:

X = - b plus minus square root of b to the power 2 - 4 a c over 2 a

Here’s a link to a playlist with a number of different examples.

However you might also get questions asking you to ‘show that.’ These will still involve using the quadratic formula, but first you must show how an area or a volume can be calculated. Once you’ve demonstrated how to calculate, you’ll then apply the formula to work out the value of x.

Top Tips!

  • Keep track of how you are answering the question by working down the page
  • Remember to show all your working logically – particularly if you are calculating an area or volume
  • Make sure the equation is equal to zero before you factorise

If you’d like to ask for any more detail, or you’re not sure about anything, please do ask a question in the comments section.

Quadratic equations are very useful, with all sorts of applications. Here’s a link through to ‘what use is a quadratic equation,’ if you would like to read further.

All best with your studies.



Watch on YouTube

‘Show That’ Quadratic Formula Volume Question GCSE Level 7

Quadratic Formula Area ‘Show That’ – GCSE Level 7

 

Here’s some additional posts that might be of interest:

How to use a probability tree; GCSE mathematics

Tangent proof; where a line touches a circle

GCSE Mathematics Proof Questions; Answers

How to work with indices; GCSE maths practice questions

Rules of Indices

Using the Cosine Rule; Grade 6 Maths GCSE Non-Calculator

The cosine rule; GCSE maths grade 6+

Parallel Lines

Parallel or perpendicular lines on a graph; mid-level questions

Edexcel GCSE Maths June 2018 Paper 1

Edexcel Maths Higher Paper 2 November 2018

AQA GCSE Maths Higher 2018; Paper 1

Edexcel GCSE Maths Foundation Paper 2017; Paper 3

Edexcel GCSE maths foundation November 2018 paper 2

Speed Distance Time; mid level GCSE mathematics questions

 

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Anti spam - please answer to leave a comment. Thank you. * Time limit is exhausted. Please reload CAPTCHA.

Search for ANY GCSE maths topic

… or search by grade

A level blog Edexcel foundation Grade 1 Grade 2 Grade 3 Grade 4 Grade 5 grade 6 Grade 7 Grade 8/9 higher Indices maths resources Quick Tests Reasoning Surds

Copyright © 2025 · Magazine Pro Theme on Genesis Framework · WordPress · Log in

This website uses cookies to improve your experience. We'll assume you're ok with this, but you can opt-out if you wish.Accept Read More
Privacy & Cookies Policy

Privacy Overview

This website uses cookies to improve your experience while you navigate through the website. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may affect your browsing experience.
Necessary
Always Enabled
Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
Non-necessary
Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.
SAVE & ACCEPT