exam Maths Puzzle Numerical Ability

For this one I got:
(-4 + -1s)(8 + -1s)

The problem is as follows:
Factor each of the following trinomials completely

s^2 - 4s - 32

How off am I?

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exam Other Question

Can someone please help me on this one?

I have to simplify.

(-8)^-4/3

The 8 is to the -4/3 power. Does that make sense?

Thanks
600?(x+20)=(600-x)/x
600/(x=20)=600/x-1
find speed of vechicle