exam Maths Puzzle Numerical Ability

(20b^3+17b^2+22b+48)(divided by)(4b+5)the answer I got was 5b^2-2b+8+8/4b+5

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exam Other Question

What is the general form of the equation: -1/2(y+2)=(x-4)^2? this is easy i know but it is a practice problem for an exam and iam drawing a blank.
4+2p=3p thanks