Question

if (3³)² =9x then 5x = ?​

Answer 1

(3^3)^2 = 9x

formula : (a^m)^n = a^mn

3^6 = 9x

3^6 = (3^2) x

3^6 /3^2 = x

formula : a^m /a^n = a^m-n

3^6-2 = x

3^4 = x

=)x=3^4 = 81

x=81

5x =5*81 = 405

405 is the answer