exam Maths Puzzle Numerical Ability

I could use some help with a few problems please!

1.) If P(x)=3(x+1)^3(x-7)(5x-2), then which of the following is a zero of the polynominal? a. 5/2 b. 0 c. 1 d. 3 e. 7

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exam Other Question

Let PMQ be a right triangle with a right angle at M. Let the line through M perpendicular to line PQ intersect line PQ at a point, H. Prove that the three angles of triangle PHM ha Factor:

x^2 +5x-36=