You are Here: Home >< Maths

# Composite Functions Help

Announcements Posted on
Why bother with a post grad? Are they even worth it? Have your say! 26-10-2016
1. two functions are defined as f(x)=x^2 and g(x)=x^2+4x-1, find a and b so that g(x)=f(x+a)+b

Just need a little help with this question as I am not too sure where to start etc. I have recognized that it wants it in a 'complete the square form' but that's about it!! Thanks in advance!
2. (Original post by metaljoe)
two functions are defined as f(x)=x^2 and g(x)=x^2+4x-1, find a and b so that g(x)=f(x+a)+b

Just need a little help with this question as I am not too sure where to start etc. I have recognized that it wants it in a 'complete the square form' but that's about it!! Thanks in advance!
Compute f(x+a) + b in terms of x, a, and b and you'll see it from there.

## Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
2. this can't be left blank
3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
1. Oops, you need to agree to our Ts&Cs to register

Updated: October 12, 2016
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:
Today on TSR

### Who is getting a uni offer this half term?

Find out which unis are hot off the mark here

Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read here first

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams