Can somebody please help me with this problem?

Question

This is the index-„³ 5 6^-5


The radical sign did not show, but the problem is:
5 is the index (outside the radical sign and then 6 is squared to the -5th power (inside the radical sign is under the radical sign)

when adding and subtracting radical expressions does the doubled number go in the inner or outter of the radical

Answer 1

sign?

The doubled number would go inside the radical sign.