Need help on my review sheet pt. 3

Sely

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I have worked on it as much as I can, but don’t know if it is correct so far
 

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So what is the common denominator?

You didn't necessarily have to do the last step. And there's more that can be done to simplify it, but I don't think they are asking for that.
 
I believe it would be 3x2/3, correct? The other parts of the problem require me to solve this for 0 and find where it is undefined. How would I get to that point?
 
Yes, that is the LCD.

Now solve [MATH]3x^{2/3} = 0[/MATH]. It's not hard.
 
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