You are Here: Home >< GCSEs

# Can you factorise 12x^2+17x+6=0? watch

Announcements
1. Its for my brother, still baffled
2. 12x^2 + 9x + 8x + 6
3x(4x+3) 2(4x+3)
(4x+3)(3x+2)
Wow I did that in my head, I'm so proud
3. (Original post by zayn008)
12x^2 + 9x + 8x + 6
3x(4x+3) 2(4x+3)
(4x+3)(3x+2)
Wow I did that in my head, I'm so proud
Idk why i struggle with such easy maths when im looking at c1
4. (Original post by BigMan Ting)
Idk why i struggle with such easy maths when im looking at c1
Tbh I used to hate this type of factorisation. Could barely do it at AS, I only learnt it because thanks to A2 when doing the product rule
5. A good way to check if you can factorise is see if the discriminant is a perfect square. In this case it's 1 and so you can . If you're bothered you can try to prove it.
6. Strictly speaking any polynomial with degree 2 or more can be factorised.
For example .
7. (Original post by B_9710)
Strictly speaking any polynomial with degree 2 or more can be factorised.
For example .
True but I think it's more the fact that we want the linear factor to be comprised of integers only rather than reals. This is gcse stuff so they won't give you anything with rationals as far as I know (Don't know about the new spec) and for integers it's true as you need b^2-4ac to be a perfect square otherwise you'll have irrational roots .

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: January 6, 2017
Today on TSR

### Edexcel GCSE Maths Unofficial Markscheme

Find out how you've done here

Poll
Useful resources

## Study tools

### Essay expert

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

See where you can apply with our uni match tool

### Make study resources

Create all the resources you need to get the grades.

### Create your own Study Plan

Organise all your homework and exams so you never miss another deadline.

### Resources by subject

From flashcards to mind maps; there's everything you need for all of your GCSE subjects.

### Find past papers

100s of GCSE past papers for all your subjects at your fingertips.