You are Here: Home >< A-levels

A-Level Maths [Help] - Simultaneous equation Watch

1. I know how to do it and what to do etc.
I may have made a mistake somewhere but was just wondering if someone could tell me what answer they got when they attempted this.

If possible could you make a this is what I done and it would be helpful knowing where i went wrong

I got a negative root (used quadratic formula) but i don't think i am suppose to get one but not sure

Thanks

I know how to do it and what to do etc.
I may have made a mistake somewhere but was just wondering if someone could tell me what answer they got when they attempted this.

If possible could you make a this is what I done and it would be helpful knowing where i went wrong

I got a negative root (used quadratic formula) but i don't think i am suppose to get one but not sure

Thanks
Okay so you got

Therefore subbing it into the other one would give you

and have a go from there.
3. Post your working and I'll check it.
4. (Original post by RDKGames)
Okay so you got

Therefore subbing it into the circle/ellipse would give you

and have a go from there.
I added those stuff to get

I added those stuff to get

You added wrong. The 54 doesn't even appear anywhere, where did you pull that from??
6. (Original post by RDKGames)
I can't see where
(i editted post btw if maybe you saw the old one)
I can't see where
(i editted post btw if maybe you saw the old one)
Check again. Like for one, where do you even pull the 54 from when the 81 is the ONLY constant term??
8. (Original post by RDKGames)
Check again. Like for one, where do you even pull the 54 from when the 81 is the ONLY constant term??
oh yeh thanks I see where i went wrong..
I done 27 instead of 27y so i got 81-27 = 54.
Thanks ill try it with the correction
9. (Original post by RDKGames)
Okay so you got

Therefore subbing it into the other one would give you

and have a go from there.
6y^2 + 45y + 81
?
6y^2 + 45y + 81
?
Correct numbers though signs aren't all right. Also =0.
11. Is 3y^2+15y+27

Posted from TSR Mobile
12. Sorry 2y^2

Posted from TSR Mobile
13. (Original post by moshe015)
Is 3y^2+15y+27

Posted from TSR Mobile
1. Close (even with you're wrong)
2. You forgot the equals sign, so technically you cannot divide by anything.
14. (Original post by RDKGames)
Correct numbers though signs aren't all right. Also =0.
6y^2 - 45y + 81
15. No need to be pedantic

Posted from TSR Mobile
6y^2 - 45y + 81
= 0

Yep. You can carry on from there
17. (Original post by RDKGames)
= 0

Yep. You can carry on from there
Thanks
I make like 100 mistakes on the easiest things. It's so annoying
18. (Original post by moshe015)
No need to be pedantic

Posted from TSR Mobile
Hard not to be when you're technically wrong. Especially with the wrong sign on the second term.
19. True that. I just saw a quadratic and simplified it. Didnt check to see if the sign was correct in the original question.

Posted from TSR Mobile

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: September 19, 2016
Today on TSR

Medicine, fastest and slowest offer senders

Have you got yours?

Official Oxford interview invite list

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

All the essentials

Student life: what to expect

What it's really like going to uni

Essay expert

Learn to write like a pro with our ultimate essay guide.

Create a study plan

Get your head around what you need to do and when with the study planner tool.

Resources by subject

Everything from mind maps to class notes.

Study tips from A* students

Students who got top grades in their A-levels share their secrets

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.