You are Here: Home >< Maths

1. No idea why I'm getting this wrong.. but..

Yet when I put it into autograph I get this:

What gives? >.<
Attached Images

2. Should be a combined inequality since it's less than/equal to zero
3. (Original post by Jackasnacks)
Should be a combined inequality since it's less than/equal to zero
So yeah I consulted my book and you're right, silly mistake... Is it correct that I have to interpret the type of symbol such as from a geometrical look at f(x)? Cannot it be done purely algebraically?
4. (Original post by SamKeene)
So yeah I consulted my book and you're right, silly mistake... Is it correct that I have to interpret the type of symbol such as from a geometrical look at f(x)? Cannot it be done purely algebraically?
If you don't want to use the graph, consider the various cases that arise seperately. Here it would be x>=3, -6<=x<=3, x<=-6.
5. (Original post by SamKeene)
So yeah I consulted my book and you're right, silly mistake... Is it correct that I have to interpret the type of symbol such as from a geometrical look at f(x)? Cannot it be done purely algebraically?
Well yes but a quick 3 second sketch of the graph shows whether it's above/below axis
It should then be clear whether it's two separate equalities or a combined one
6. (Original post by SamKeene)
So yeah I consulted my book and you're right, silly mistake... Is it correct that I have to interpret the type of symbol such as from a geometrical look at f(x)? Cannot it be done purely algebraically?
Yes - if you want a result that is negative then the brackets must have opposite signs.
7. (Original post by SamKeene)
No idea why I'm getting this wrong.. but..

A minor point: here you can write directly, which removes the need for factorisation.

Related university courses

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: January 19, 2015
Today on TSR

Exam Jam 2018

Join thousands of students this half term

Poll
Useful resources

Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

How to use LaTex

Writing equations the easy way

Study habits of A* students

Top tips from students who have already aced their exams

Chat with other maths applicants