Final answer:
To simplify the expression 9^(3) * 9^(5), add the exponents and keep the base the same, resulting in 9^(8).
Step-by-step explanation:
To simplify the expression 9^(3) * 9^(5), we can use the property of exponentiation that states when multiplying exponential expressions with the same base, we add the exponents and keep the base the same. In this case, the base is 9. So, 9^(3) * 9^(5) = 9^(3+5). The sum of the exponents is 8, so the simplified expression is 9^(8).
Learn more about Simplifying exponential expressions