You must simplify the function first until the exponent becomes a flat x. Step 1 Leave 1/3 only that is the value a, initial value. You are looking for the base Step 2 Deal with the parentheses. Factor 24 and you get 2 and the cube of 3. Step 3 Separate the exponent (2) (x) Step 4 Now square each term in parentheses 2 squared and cube 3 squared 2 2 will be 4, the other expression means cube of 3 times cube of 3 and that is cube of 9 Step 5 Your base should be (4 cube of 9)