Question 705470
You are probably mixing up results
{{{1024=2^10}}} it is not even a multiple of 3, much less a power of 9
{{{9=3^2}}} 
{{{9^(5/2)=(3^2)^(5/2)=3^(2(5/2))=3^5=3*3*3*3*3=243}}}