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# AQA AS Maths C1, C2 and S1B watch

1. Hi, guys we could use this thread for revision help and help us put a mark scheme together tomorrow. Feel free to link any questions.
2. Just gonna do 3 past papers tonight. Core 1 is delightful if you go ahead and learn your stuff.
3. Has anyone got any quick ways of factorising quadratics where a doesn't = 1 (e.g. 6x^2 - 2x - 8)? It always takes me ages to find the right numbers.
4. (Original post by Charliejb)
Has anyone got any quick ways of factorising quadratics where a doesn't = 1 (e.g. 6x^2 - 2x - 8)? It always takes me ages to find the right numbers.
Yes! Would you like a photo of my technique?
5. (Original post by Charliejb)
Has anyone got any quick ways of factorising quadratics where a doesn't = 1 (e.g. 6x^2 - 2x - 8)? It always takes me ages to find the right numbers.
I just use the quadratic formula to find one solution and then factorise for the second. For the one you mentioned if it's equal to zero you can half it for the same solutions. 3x^2 -x - 4 becomes much easier to solve because the first bracket must contain 3x and the second x.
6. (Original post by lizard54142)
Yes! Would you like a photo of my technique?
That would be very helpful, thanks
7. (Original post by -jordan-)
I just use the quadratic formula to find one solution and then factorise for the second. For the one you mentioned if it's equal to zero you can half it for the same solutions. 3x^2 -x - 4 becomes much easier to solve because the first bracket must contain 3x and the second x.
Thanks, I never thought of halving it first.
8. (Original post by Charliejb)
That would be very helpful, thanks

Note I have broken it down into every step here to help people understand, I usually do this in a couple seconds in my head (perhaps writingout the square to the side if it's more complex)!
9. (Original post by lizard54142)

Note I have broken it down into every step here to help people understand, I usually do this in a couple seconds in my head (perhaps writingout the square to the side if it's more complex)!
Thanks , I wish my teachers had taught me this.
10. (Original post by Charliejb)
Thanks , I wish my teachers had taught me this.
It's really nifty! Practise on a couple quadratics

Just realised I made an error, the first square should be:
3 4
2 2

How embarrassing.. but I hope you get the general idea.
11. Spoiler:
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hi guys good luck for tomorrow! 😁
12. (Original post by salihah)
Spoiler:
Show
hi guys good luck for tomorrow!
You too Salihah
13. (Original post by Charliejb)
Has anyone got any quick ways of factorising quadratics where a doesn't = 1 (e.g. 6x^2 - 2x - 8)? It always takes me ages to find the right numbers.
I use this method that I found online somewhere a while back. Excuse the handwriting

14. (Original post by -jordan-)
I just use the quadratic formula to find one solution and then factorise for the second.
How did I never think of this?? Thank you so much, you just saved me so much time!!

Good luck everyone!
15. Wasnt factorising a GCSE topic?
16. (Original post by kas69)
Wasnt factorising a GCSE topic?
Yes it is but when you're working with large numbers it can be difficult to find factors quickly (for me anyway, lol)
17. How was it?
What did everyone get for the gradient/equation of a parallel question?
18. (Original post by Signorina)
Yes it is but when you're working with large numbers it can be difficult to find factors quickly (for me anyway, lol)
Same, i find it sticky

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19. (Original post by Signorina)
Yes it is but when you're working with large numbers it can be difficult to find factors quickly (for me anyway, lol)
Lol im just joking. Im no maths expert ..

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