Answer
$3^2\times3^8=3^{10}$
Work Step by Step
$3^2\times3^?=3^{10}$
To multiply powers with the same base, we add the exponents. This means that the sum of $2$ and the second exponent must be equal to $10$. This is only true if the second exponent is $8$ because:$2+8=10$
This gives us the equation $3^2\times3^8=3^{10}$