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# Maths Question

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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.

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