Question

Help, and thank you in advance!
(2/5n^9)^2
Came across this new problem not sure how to complete it.

Answer 1

I'm supposed to simplify it. The options are,
10n^18
4/5n
4/10n^18
4/25n^18

Answer 2

\[(\frac{ 2 }{ 5n^9 })^2 = \frac{ 2^2 }{ (5n^9)^2 } = \frac{ 4 }{ 25n^{18} }\]

exponents multiplied since

\[(x^{a})^{b} = x^{ab}\]

Answer 3

Ok thank you very much I understand :)