In this video, the steps to solve question 8 in grade 12 practice on factoring and sketching a given polynomial are presented.
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Question:
Function \( f \) is defined by \( f(x) = - x^4 - 5x^3 - 3x^2+9x \)
a) Factor \( f(x) \) completely.
b) Use the zeros to sketch the graph of \( f \).
