exam Maths Puzzle Numerical Ability

I need help in determining which of the following binomials is a factor of the given polynomial
p(x)=x4+4x3+2x2-4x-3

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exam Other Question

a loading crew estimates that it can load 8 boxes in 20 mins.at this rate,how many boxes could it load in 1 hr? Please help me with this question: Two cars, one going north at 40 mph and one going south at 50 mph, leave town at the same time. In how many hours will they be 360 miles apart?