exam Maths Puzzle Numerical Ability

Please help. I am not sure about the topic because I am not sure which topic to pick

Multiply.

9q^8 • 9q^5

Thanks
JMS

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exam Other Question

If
(2x+1)(x-5)
--------- = 0,then x=
x+3
I have to factor this problem and I have not found a solution for it.
8ksquared-19k+9