solve x^2 - 2 < 2

Change the inequality to an equalsx2 -2=2solve as normalx2 -2=2-2x2 -4=0factorise(x-2)(x+2)=0so x=-2 and x=2However, how do you know if the answer is bigger or smaller than -2 and 21st draw the graph for when the equation equals 0. ( on whiteboard)2nd Look at the question, is the inequality less than or greater than? Make sure before doing this that the x with the highest power is on the left!3rd if the inequality is less than, highlight the section of the graph below the x axis/ below zero. This is a beard. if the inequality is greater than, then highlight the section of the graph above the x-axis/ above zero. This is side burns! (see whiteboard)4th the highlighted section of the graph indicates the solution therefore, in this case, we have a beard and so the solution is -2<x<2 If we had side burns the solutions would be x<-2 and x>2. 5th Be careful with < or <=. Use the same one that is used in the question.

AM
Answered by Alicia M. Maths tutor

3246 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Make s the subject of: v^2= u^2+2as


What is the difference between LCM and HCF?


The probability of obtaining heads on a biased coin is 0.4. The coin is tossed 600 times. Write down the mean number of heads and the standard deviation of the number of heads.


Complete the square for the equation x^2 - 12x + 8 = 0


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning