Question

Please help! I don't understand!

Answer 1

The answer to question #1 is 11:

√x² = √121

√x² = x
√121 = 11

So the answer is x = 11.
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For the second question, I don't know what the exact answer is, but I do know that it is one of the options with 8/3. I can't figure this out because I don't know how to do √x³. Here was the work that I did do:

√64        8           Based on this, I would say the answer has to be positive 8/3. 
------- = ----- 
√27       3√3