exam Maths Puzzle Numerical Ability

Find all the numbers for which the rational expression is undefined:
q^3-8a/q^2-64

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exam Other Question

I have been struggling with this problem for a while now and I was wondering if anyone could help me? I would deeply appreciate it!! Please and Thank you!!

Solving Problems Involving Inequalities
Solve.
Suppose that triangle ABC has a right angle at B, that BF is the altitude drawn from B to AC, and that BN is the median drawn from B to AC. Find angles ANB and NBF, given that angle C is 42 degrees.