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# Maths help (equations) watch

1. So I managed to do part a & b but unsure on how to go about answering part c. Any help would be appreciated!
2. make f(x)=g(x) as it says.
Re-arrange and solve for x.

x^2-6x+8=x+3
3. (Original post by Kangie)
So I managed to do part a & b but unsure on how to go about answering part c. Any help would be appreciated!
Write the f(x) expression on the left-hand-side, g(x) on the right-hand-side, then rearrange so that one side equals 0 then solve the quadratic using methods you've learnt.
4. Just for reference

5. (Original post by Kangie)
So I managed to do part a & b but unsure on how to go about answering part c. Any help would be appreciated!

(c) x^2 - 6x + 8 = x = 3
x^2 - 7x + 5 = 0

Quadratic formula or complete the square
6. (Original post by naxiv)
Just for reference

You are not supposed to give the OP the direct answer, instead help them to the answer.
7. (Original post by notnek)
Write the f(x) expression on the left-hand-side, g(x) on the right-hand-side, then rearrange so that one side equals 0 then solve the quadratic using methods you've learnt.
Oh I completely forgot about the quadratic formula as I hadn't used it in so long! Now it makes sense, thanks
8. (Original post by Kangie)
Oh I completely forgot about the quadratic formula as I hadn't used it in so long! Now it makes sense, thanks
That's a good way do doing it but it would be longer. Well it would be alright, it'd be easier to do completing the square though. However, you can cross-check your answer by using both and checking if you got the same answers.

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