You are Here: Home >< Maths

Simultanious equations (C1) watch

1. I'm having difficulty with the following question:

Solve the simultaneous equations

The elimination method doesn't seem to work at all, and when I use the substitution method I get difficult numbers like or which can't be right. Any idea where I might be going wrong?

Digichris.
2. (Original post by Digichris)
I'm having difficulty with the following question:

Solve the simultaneous equations

The elimination method doesn't seem to work at all, and when I use the substitution method I get difficult numbers like or which can't be right. Any idea where I might be going wrong?

Digichris.
Rearrange the second equation to make either x or y the subject, square it and sub it into the first equation to get either x or y. Once you know one variable, you can sub it back into the second equation to get the other.

EDIT: you should get 2 sets of x and y values, with each x value having a corresponding y value.
3. show that y = 2x - 4, then sub that in the equation with 4x^2.....etc, get the value(s) for x then value(s) for y
4. Heh, thank you. I just realised I was making a stupid mistake xD
5. (Original post by Digichris)
Heh, thank you. I just realised I was making a stupid mistake xD
cool

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: March 26, 2011
The home of Results and Clearing

2,767

people online now

1,567,000

students helped last year
Today on TSR

Took GCSEs this summer?

Fill in our short survey for Amazon vouchers!

University open days

1. Bournemouth University
Wed, 22 Aug '18
2. University of Buckingham
Thu, 23 Aug '18
3. University of Glasgow
Tue, 28 Aug '18
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