Am I working this problem properly?

If , and , find .

Working:

If , and then, = .

Am I correct, and is that the final answer?

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- February 10th 2010, 12:24 PMkoumoriComposite functions
Am I working this problem properly?

If , and , find .

Working:

If , and then, = .

Am I correct, and is that the final answer? - February 10th 2010, 12:27 PMpickslides
- February 10th 2010, 03:10 PMkoumori
- February 10th 2010, 03:16 PMicemanfan
Actually, what you should have found was that the expression simplifies to

,

and that can be further simplified to

.

You can also take out a factor of 3:

- February 10th 2010, 05:49 PMpickslides
- February 11th 2010, 11:00 AMkoumori
I see! Because I should use F.O.I.L on making it

. Then I have to do simple addition of like terms to net a result of . Then do as you said and factor everything by 3.

Finally, expand the exponent so becomes:

Funny how I lost my head at this once the big words came out......(Surprised).

Thank you for your help guys!