[Tulian]

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 ?

[Hazza616]

You need to factorise the denominator differently, so you get a bracket common to the numerator.

[Xarren]

What you've done is correct.

Now do --f(x)

That'll mean that f(x) = -5(4-x)/(6x(4-x)

[Tulian]

Oh I thought of doing that but then I thought multiplying a fraction by -1 flips it ?

[Xarren]

(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.

[Tulian]

(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

[Xarren]

This makes me long to gcse maths. Life was so simple back then..

[Tulian]

(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 :/

[Xarren]

(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?