exam Maths Puzzle Numerical Ability

Can someone help me factor the following equation:
2 3
9a -24ab +16b
The 2 and 3 above the equation are exponents.
Thank

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exam Other Question

given angle 1 and angle 2 are complementary
ray BD bisects angle ABC
Prove: m angle 2 = 45 degrees SOLVE.

-4x >_ -0.8

These are just as confusing as the other ones I selected. This is the last one tho. Sorry but if someone can help with these please.