exam Maths Puzzle Numerical Ability

What is f(x + 1) if f(x)= 6x^3 - 3x^2 + 4x - 9

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exam Other Question

The length of a rectangle is 1 inch. less than twice the width. the area of the rectangle is 21 spuare inches. What is the length of the rectangle. Find the probability of rolling a prime number when a die is rolled.