Directions: using the given zero, find all of the zeros and write a linear factorization of f(x).

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What are you given? An unfactored equation? If they give you something like ax^3+bx^2+cx+d, and say k is a zero, you can use synthetic division to factor it out. This video: http://www.brightstorm.com/d/math/s/algebra-2/u/factoring/t/using-synthetic-division-to-factor explains how to do synthetic division. It should be a good guide to figure out how to do your problems.