You are Here: Home >< Maths

# FP1 Complex Numbers Question Watch

1. I've attempted this question (link below) several times but am not obtaining the correct answer.

I know it's probably a stupid mistake, but does anyone know where I'm going wrong?

Thanks!

Question + my attempt at it:

http://cl.ly/image/1k39252s2X45
2. Line 11, you made an error when dividing by b^2 (not sure why you even did this in the first place). (a/b)/b=a/b^2, not (as you thought) (a/b)/b=a/(b/b)=a/a=a.
3. (Original post by james22)
Line 11, you made an error when dividing by b^2 (not sure why you even did this in the first place). (a/b)/b=a/b^2, not (as you thought) (a/b)/b=a/(b/b)=a/a=a.

Thanks, I'll consider this in my next attempt.
4. Nope, now I have a quartic equation, which I'm not expected to know how to solve, so I know I've taken a 'wrong turn' somewhere. I'm very prone to stupid mistakes in maths, but I can't find any. Any help appreciated, thanks.

New attempt: http://cl.ly/image/0W2s0v1c241m
5. (Original post by RossK)
Nope, now I have a quartic equation, which I'm not expected to know how to solve, so I know I've taken a 'wrong turn' somewhere. I'm very prone to stupid mistakes in maths, but I can't find any. Any help appreciated, thanks.

New attempt: http://cl.ly/image/0W2s0v1c241m
That's really just a quadratic, which you do know how to solve.

I cannot see any errors in that attempt.
6. (Original post by james22)
That's really just a quadratic, which you do know how to solve.

I cannot see any errors in that attempt.
Success!

Thank you so much

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: July 21, 2014
Today on TSR

### Degrees to get rich!

... and the ones that won't

### Women equal with Men?

Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• Poll
Useful resources

## Make your revision easier

### 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

Can you help? Study help unanswered threads

## Groups associated with this forum:

View associated groups
Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.