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# Simplifying fraction Tweet

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1. Simplifying fraction

Got stuck on this problem that I'm not sure on what to do next.

I factorised the top and bottom to give:
5(4-x) as the numerator and 6x(x-4) as the denominator. Not sure what to do next ?
2. Re: Simplifying fraction
You need to factorise the denominator differently, so you get a bracket common to the numerator.
3. Re: Simplifying fraction
What you've done is correct.

Now do --f(x)

That'll mean that f(x) = -5(4-x)/(6x(4-x)
4. Re: Simplifying fraction
Oh I thought of doing that but then I thought multiplying a fraction by -1 flips it ?
5. Re: Simplifying fraction
(Original post by Tulian)
Oh I thought of doing that but then I thought multiplying a fraction by -1 flips it ?
it reverses the either the numerator or denominator (you pick which one), as needed.

Making it ^-1 flips it.
6. Re: Simplifying fraction
(Original post by Xarren)
it reverses the either the numerator or denominator (you pick which one), as needed.

Making it ^-1 flips it.
Ah okay thanks, got it now
7. Re: Simplifying fraction
This makes me long to gcse maths. Life was so simple back then..
8. Re: Simplifying fraction
(Original post by Xarren)
This makes me long to gcse maths. Life was so simple back then..
And I think I need to recap it now as its the first question of a C4 paper :/
9. Re: Simplifying fraction
(Original post by Tulian)
And I think I need to recap it now as its the first question of a C4 paper :/
Lol. Was C4 really that easy?