exam Maths Puzzle Numerical Ability

Factor each polynomial completely. If a polynomial is prime say so

32aČ + 4a -6

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exam Other Question

Can you please help me by showing me how to simplify this.

((3x^a y^b)^3/ (-3x^a y^b)^2 )^2

I am not sure if I am writing this properly. The problem is written as a fraction and the entire problem is squared.
x^2+5x-14 divided by x^3+10x+21X

Hi, I just wante to make sure I have the right answers, which is X-2 over x(X+3). Thank You!