SOLUTION: I need help with this problem: Graph the function below, then factor completely. f(x) = 2x4 + 9x3 + x2 + - 21x + 9

SOLUTION: I need help with this problem: Graph the function below, then factor completely. f(x) = 2x4 + 9x3 + x2 + - 21x + 9

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Question 1150149: I need help with this problem:
Graph the function below, then factor completely.
f(x) = 2x4 + 9x3 + x2 + - 21x + 9
Answer by josgarithmetic(39620) (Show Source): You can put this solution on YOUR website!
Have you tried by grouping? In any case, you should be able to find -3 and +1 to be roots of f. Try synthetic division to reduce f to its factors.
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