Please explain your answer. Do not put 9h and 5h in parenthesis.
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First, let's consider h-2 * h10
This is h8
The Ruie is when you have two similar numbers (same base), each raised to a power, the product of these (base) numbers raised to their power is the base raised to the sum of e powers.
i.e. (ax)*(ay) = a(x+y)