book Maths Puzzle Numerical Ability

Thanks Earlsdon. It really helped me out alot. I now need help with this problem. Thanks.
What are the next two terms of the sequence 32, -48, 72, -108, . . . ?

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book Other Question

I have a problem 3x^0+(3x)^0. I am having a hard time figuring this problem out. Your help would greatly be appreicated. If M (5,2) is the midpoint of segment PQ and the coordinates of Q are (3,-3), find the coordinates of P.