Simplify the following:
Notice the negative exponent? Now, it is better to change it into positive exponent using the exponent law as shown on the right.
This term now becomes:
Now, let's apply the fractional exponent formula that we have just learned earlier on.
Hence, this term becomes:
Next, cube root of 27 is 3. (i.e. 27 = 3 x 3 x 3)
Now, (3)2 = 3 x 3 = 9. Therefore, we get:
Clearly, the answer is B.
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