exam Maths Puzzle Numerical Ability

There are two real values of r for which:

(x^4)-(x^3)-(18x^2)+52x+k

has a factor of the form x-r. One of these values is r=2. What is the other value of r?
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exam Other Question

A man has a choic of a white, yellow, or blue shirt. He also may select a red tie or a green tie. How many different outfits can he make of 1 shirt and 1 tie? Use the equation of the exponential function whose graph passes through the points (0,-2) and (2,-50) to find the value of y when x=-2.