exam Maths Puzzle Numerical Ability

Use the factor theorem to decide whether or not the second polynomial is a factor of the first.
9) 4x^2 - 33x + 65; x - 5

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exam Other Question

ok so i have a factoring polynomials test and im so confued!! the problem is
9b^2-20 i know that its prime but i dont know why its prime! please help!! The length of a rectangle is 3 cm greater than its width.The perimeter is 24 cm. Find the dimensions of the rectangle?

bottom of the rectangle is x+3
the side which is the length is x