You are Here: Home >< Maths

# Maths Question Watch

1. C1 solomon paper L
says 1 real root is that the same as two equal roots
Question 3a

Also for 6b I got the answer like this:
y-y1=2/5(x-x1)
5y-5y1=2x-2x1
2x-5y+(-2x1+5y1)

this part will just be a number
so k=-5
2. (Original post by Acrux)
C1 solomon paper L
says 1 real root is that the same as two equal roots
Question 3a

You tend to say that there are equal roots if the discriminant is 0. So there are 2 equal roots to this quadratic.
3. (Original post by Acrux)
C1 solomon paper L
says 1 real root is that the same as two equal roots
Question 3a
In reference to 3)a) The only way to have one real root in a quadratic is if the root is repeated, am i right in saying you worked out that the discriminant of f(x) was equal to 0?

Also, did you have a problem with 6b or are you just saying what you got?
4. (Original post by Acrux)
so k=-5
This is fine and correct.
5. (Original post by B_9710)
You tend to say that there are equal roots if the discriminant is 0. So there are 2 equal roots to this quadratic.
So it is correct, just that mark scheme says 1 real root
discriminant = 0

Also can some check the other problem in OP 6b - Okay thanks Zacken
6. (Original post by Acrux)
So it is correct, just that mark scheme says 1 real root
discriminant = 0

Also can some check the other problem in OP
Yes.

Can you check my post?
7. (Original post by Zacken)
Yes.

Can you check my post?
Yes.
Is part one correct in saying two equal roots mark scheme says 1 equal root.. dont want to drop easy marks
8. (Original post by Acrux)
Yes.
Is part one correct in saying two equal roots mark scheme says 1 equal root.. dont want to drop easy marks
Yeah, they both basically mean the same thing. Although saying 1 equal root is nonsensical. You either say 1 real/real and repeated root or two equal real roots.
9. (Original post by Zacken)
Yeah, they both basically mean the same thing. Although saying 1 equal root is nonsensical. You either say 1 real root or two equal real roots.
Thanks.
10. (Original post by Acrux)
Yes.
Is part one correct in saying two equal roots mark scheme says 1 equal root.. dont want to drop easy marks
Are you sure it said 1 equal root? not 1 repeated root?
11. (Original post by LewisClothier)
Are you sure it said 1 equal root? not 1 repeated root?
Yes I meant 1 real root not 'equal'
12. (Original post by Acrux)
Yes I meant 1 real root not 'equal'
okay yeah that makes more sense, I'd say if it's a question that is asking for a quantity or a number of roots and you know that the discriminant is zero, always put 1 to show you know what that means, it is unlikely that moderators would look at whether or not you said equal/repeated etc. They will simply see if you put 0, 1 or 2 and mark correct for 1, so to be sure I'd always write 1 real root there.

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: April 13, 2016
Today on TSR

### Is this person a genius?

...with these A Level results?

### I think I'm transgender AMA

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.