You are Here: Home >< Maths

Announcements Posted on
Last day to win £100 of Amazon vouchers - don't miss out! Take our quick survey to enter 24-10-2016
1. Howdy .

I have attached the question and answers.

I don't fully understand part C. I found there to be two solutions of (-0.5,2) and (1,5).

The answer only takes into consideration the (1,5) for the x and y values. Is this something to do with the other answer having a negative x value? If so, can someone explain why that wouldn't be used please?

Thanks

Edit: I meant Quadratic simultaneous equations for the title.
Attached Images

Howdy .

I have attached the question and answers.

I don't fully understand part C. I found there to be two solutions of (-0.5,2) and (1,5).

The answer only takes into consideration the (1,5) for the x and y values. Is this something to do with the other answer having a negative x value? If so, can someone explain why that wouldn't be used please?

Thanks

Edit: I meant Quadratic simultaneous equations for the title.
Does it make sense for you to have a negative width or length?
3. (Original post by Zacken)
Does it make sense for you to have a negative width or length?
No, that is what I was thinking but it just confuses me that there are two solutions but we use one.

Where would the negative solution be then? I am used to answering just normal questions with no real world context. So I would be able to see both points of intersection on a graph as it include negative axes.

In the real world there isn't a 'negative section' so do we just ignore this? As where would it be?

Finding it hard to explain, does that make any sense?
In the real world there isn't a 'negative section' so do we just ignore this? As where would it be?

Finding it hard to explain, does that make any sense?
Yep, when you do real-world problems you need to ignore solutions that don't fit reality.
5. (Original post by Zacken)
Yep, when you do real-world problems you need to ignore solutions that don't fit reality.
Ah okay.

Thanks

## 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: May 21, 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

### How does exam reform affect you?

From GCSE to A level, it's all changing

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