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

(x+y)2-3
__________ x=1/2 y=-3/2
x+y
How this could be SLOVE??
sqrt( 4x^2 +5-1 )=2(x+2)