Find All Values Of $X$ Such That $f ( x ) > 0$

question 12

Multiple Choice

Find all values of $X$ such that $f ( x ) > 0$ $f ( x ) = x ^ { 3 } + 4 x ^ { 2 } - 16 x - 64$

• A) \(( - \infty , \infty )\)
• B) \(( - \infty , - 4 ) \cup ( - 4,4 )\)
• C) \(( - \infty , - 4 ] \cup [ - 4 , \infty )\)
• D) \(( - \infty , - 4 ) \cup ( 0,4 )\)
• E) \(( - 4,4 )\)

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