I need a common denominator?

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- Mar 20th 2011, 04:36 PMreallylongnicknamerational exp - simplify

I need a common denominator? - Mar 20th 2011, 04:50 PMpickslides
Try

Or find the lowest common mulitple of the 2. Maybe - Mar 20th 2011, 05:05 PMreallylongnickname

How's this look? - Mar 20th 2011, 05:23 PMpickslides
That's a good start but its not quite correct.

- Mar 20th 2011, 05:43 PMreallylongnickname
- Mar 20th 2011, 05:46 PMe^(i*pi)
You're not done cancelling yet. Recall your six times table

You're on the right track though - Mar 20th 2011, 06:08 PMreallylongnickname
Oh.

- Mar 20th 2011, 06:11 PMpickslides
- Mar 20th 2011, 07:45 PMreallylongnickname
Is this the final answer?

- Mar 20th 2011, 07:53 PMpickslides
- Mar 20th 2011, 08:07 PMProve It
- Mar 21st 2011, 05:26 AMHallsofIvy
In fact, it would have been better to use as your common denominator rather than .

- Mar 21st 2011, 06:21 AMProve It
Or even better still, note that , then your LCD is ...