exam Maths Puzzle Numerical Ability

USe synthetic division to find the polynomial which is not a factor of:
x^3+2x^2-9x-18
(x+2)(x-2)(x-3)(x+3)

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exam Other Question

Peter plans to fence off a square feed lot and then cross-fence to divide the feed lot into four smaller square feed lots. If he uses 480 ft of fencing, then how much area will be filled in?
The answer in the back of the book is 6400ft squared.
Find the exact lengt of the hypotenuse of this right triangle. give exact answer.

A=9
B=6
c=