Question

(5x^9/10y^11)^2 the answer is x^18/4y^22 Why is the 4 on the bottom is what I am wondering?

Answer 1

\[\frac{ 5x ^{9} }{ 10y ^{11} } = \frac{ x ^{9} }{ 2y ^{11} }\]

Answer 2

4 naturally comes in the denominator because 2 is in the denominator and 2 squared is 4.