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# C3 Functions Question watch

1. Hi all,
looking for some help on this question!
Any help is appreciated
Thanks
James

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2. Have you found ff(x) in terms of a and b?
3. (Original post by james0902)
Hi all,
looking for some help on this question!
Any help is appreciated
Thanks
James

Posted from TSR Mobile
Find ff(x) in terms of a and b then proceed to compare coefficients, derive some equations in terms of a and b, then solve them.
4. (Original post by RDKGames)
Find ff(x) in terms of a and b then proceed to compare coefficients, derive some equations in terms of a and b, then solve them.
I believe it's a^2x + ab + b = 9x - 28
But I don't know where to go from there

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5. (Original post by james0902)
I believe it's a^2x + ab + b = 9x - 28
But I don't know where to go from there

Posted from TSR Mobile
Equate the coefficients of x and the constant term.

So if you had then you'd have and . In this case, you have . So what can you get?
6. (Original post by james0902)
I believe it's a^2x + ab + b = 9x - 28
But I don't know where to go from there

Posted from TSR Mobile
Compare the coefficients of and because they must be equal to each other on both sides.
7. Can anyone help me with equating the coeffients? I'm rusty and just don't know how to move forward with it

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8. (Original post by james0902)
Can anyone help me with equating the coeffients? I'm rusty and just don't know how to move forward with it

Posted from TSR Mobile
There is literally an example above my post. Use it, it isn't a complicated technique and makes sense.

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Updated: September 4, 2016
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