You are Here: Home >< Maths

1. Please help me with this, I've tried for way too long on this, dont ask me to show my working because I've already wasted 1 hour on this and don't want to waste another minute now. Thanks.
Attached Images

2. ignore me im an idiot

Posted from TSR Mobile
3. (Original post by Jas1947)
Please help me with this, I've tried for way too long on this, dont ask me to show my working because I've already wasted 1 hour on this and don't want to waste another minute now. Thanks.
If you let , the equation becomes which you can solve.

Once you have y=... it will be the equivalent to 2x=... which you can just use logs to find what what the two values of x are. Add those two roots together and you're done.
4. (Original post by RDKGames)
If you let , the equation becomes which you can solve.

Once you have y=... it will be the equivalent to 2x=... which you can just use logs to find what what the two values of x are. Add those two roots together and you're done.
Oh my god i remember now! I cant believe i wasted so much time, thank you!
5. (Original post by RDKGames)
If you let , the equation becomes which you can solve.

Once you have y=... it will be the equivalent to 2x=... which you can just use logs to find what what the two values of x are. Add those two roots together and you're done.
I was trying to figure out where I went wrong, I thought product meant multiplication so I was multiplying the roots xD

Edit: read the question again and it says sum and not product. ok then im seeing things

Posted from TSR Mobile
6. (Original post by HFancy1997)
I was trying to figure out where I went wrong, I thought product meant multiplication so I was multiplying the roots xD

Edit: read the question again and it says sum and not product. ok then im seeing things

Posted from TSR Mobile
Take a break from maths at 1am, mate.
7. For a more elegant method, gives so that where are the roots. Then taking gives
8. (Original post by Zacken)
For a more elegant method, gives so that where are the roots. Then taking gives
So that's how you do it. Back then at midnight I started thinking how the heck I could apply the alpha beta stuff to this and you've shown it, so thanks.
9. (Original post by RDKGames)
So that's how you do it. Back then at midnight I started thinking how the heck I could apply the alpha beta stuff to this and you've shown it, so thanks.
No problem. Motivating thing here is that product of roots of a polynomial is easy and logarithms turn products into sums.

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: August 3, 2016
Today on TSR

### Am I pregnant?

...or just paranoid?

### A robot wrote Harry Potter?

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

### 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

## 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.