7^-3× 7^-5
To simplify 7^-3 × 7^-5, we can combine the exponents:
7^(-3) × 7^(-5) = 7^(-3 + -5) = 7^-8.
Therefore, 7^-3 × 7^-5 is equal to 7^-8.
To simplify the expression, we can use the properties of exponents. When multiplying powers with the same base, we add their exponents.
So, 7^-3 × 7^-5 can be rewritten as 7^(-3 + -5).
Adding the exponents, we get 7^-8.
Therefore, the simplified form of the expression 7^-3 × 7^-5 is 7^-8.