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# C1 Maths Surds in Simultaneous Equations Help!

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1. I've started C1 for my A-Level this year and I'm doing surds at the moment. I've grasped the topic well but for my homework, I've got to do this simultaneous equation that I'm stuck on. I've been on it for almost an hour now with no progress whatsoever. Any help would be appreciated.

xsqrt5 + 2y = 3

x + y = 1

I've tried substituting x and y into the top equation but nothing has come out of it for me.
2. (Original post by AndINeedHelp)
I've started C1 for my A-Level this year and I'm doing surds at the moment. I've grasped the topic well but for my homework, I've got to do this simultaneous equation that I'm stuck on. I've been on it for almost an hour now with no progress whatsoever. Any help would be appreciated.

xsqrt5 + 2y = 3

x + y = 1

I've tried substituting x and y into the top equation but nothing has come out of it for me.
3. (Original post by AndINeedHelp)
I've started C1 for my A-Level this year and I'm doing surds at the moment. [...] I've tried substituting x and y into the top equation but nothing has come out of it for me.
It's the same as any other simultaneous equation, the second one re-arranges to which you can then plug into the first equation to get an equation solely in and then solve for it.
4. (Original post by RDKGames)
So I rearrange the second equation into y = 1 - x

From that, I get x sqrt 5 + 2 - 2x = 3 and xsqrt5 - 2x = 1

I've absolutely no clue where to go from here.
5. (Original post by AndINeedHelp)
So I rearrange the second equation into y = 1 - x

From that, I get x sqrt 5 + 2 - 2x = 3 and xsqrt5 - 2x = 1

I've absolutely no clue where to go from here.
Move the +2 over to the RHS and factor out the x.
6. (Original post by Guinnie)
you can't solve the simultaneous equaitons without a calculator
Well, that's not true because we're expected to solve this without one.
7. (Original post by Guinnie)
you can't solve the simultaneous equaitons without a calculator
say whaaaaatttt? you deffo can lol
8. (Original post by RDKGames)
Move the +2 over to the RHS and factor out the x.
xsqrt5 - 2x = 1

I honestly don't know I can work out x from this.
9. (Original post by AndINeedHelp)
Well, that's not true because we're expected to solve this without one.
The method is to get all the x's together on one side and everything else on t'other, then pick out a factor of x. You should be able to solve from there, right?
10. (Original post by AndINeedHelp)
xsqrt5 - 2x = 1

I honestly don't know I can work out x from this.
x(rt 5 -2)...
11. (Original post by AndINeedHelp)
xsqrt5 - 2x = 1

I honestly don't know I can work out x from this.
12. (Original post by Muttley79)
Have you read the guidelines? Please - just remove it - the fact it might have helped you is irrelevant.
how is it against the rules? just wondering
13. (Original post by melisss22)
how is it against the rules? just wondering
http://www.thestudentroom.co.uk/show....php?t=4066671

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