Answer:
C) cannot be simplified
Explanation
We want to simplify the radicals:
[tex] \sqrt[3]{7} - \sqrt[4]{7} [/tex]
We can rewrite this as exponents:
[tex] {7}^{ \frac{1}{3} } - {7}^{ \frac{1}{4} } [/tex]
Since the base are the same but are subtracting, we do not have any rule of indices for subtracting unlike indices .
Therefore the expression cannot be simplified further.
