How do I solve a quadratic equation?

In a quadratic equation the highest power is 2. This means that we are looking for up to 2 answers. The first thing we are going to try to do is factorise the equation. We draw two sets of brackets side by side. In each bracket, we will have x +/- some number. We need to work out what those numbers should be. (Shows example equation) In this example the number next to the x term is 5 and the number out here on its own is 6. We need to find two numbers which multiply to together to make 6 and also add together to make 5. Can you think of any? (Once answer is found or given) So now we write x+2 in the first bracket and x+3 in the second bracket. See how this whole equation is equal to 0? That means that the answers to the equation have to be something + 2 = 0 and something + 3 = 0. So what would the two answers be?(Once answer is found or given) To check that you are right replace the Xs with each answer to see if you get zero.

Answered by Leszek W. Maths tutor

2098 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

GCSE 2011: Solve the simultaneous equations: y^2 = 2x + 29 and y = x - 3


Solve this simultaneous equation using the process of elimination: -6x - 2y = 14 3x - 2y = 5


Solve the simultaneous equations: 6x + 2y = -3, 4x - 3y = 11


Square root of 81?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2024

Terms & Conditions|Privacy Policy
Cookie Preferences