Answer:
b^8
Step-by-step explanation:
Answer:
It is not correct, x = -5
Step-by-step explanation:
It's difficult to make out, but I think the task is to expand

Write the number in polar form first:

By DeMoivre's theorem, you have

and converting back to Cartesian form, this number is equivalent to
If you change the fraction to decimals that will make it easier to compare