The binomial x + 3 is one factor of 2x^3 – x^2 – 18x + 9. Use complete sentences to explain how you use (either) polynomial division or synthetic division to find the remaining factors. List the remaining factors.
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2x3-x2-18x+9 = 2x(x2-9)-1(x2-9) = (2x-1)(x2-9) = (2x-1)(x-3)(x+3)