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 one year ago
In which interval will the graph of f(x) = x3 + 4x2 – 4x – 16 be above the xaxis?Select one of the options below as your answer: A. (2, 2) È (4, ∞) B. (4, 2) È (2, ∞) C. (∞, 2) È (2, 9) D. (4, 2) È (2, 4)
 one year ago
In which interval will the graph of f(x) = x3 + 4x2 – 4x – 16 be above the xaxis?Select one of the options below as your answer: A. (2, 2) È (4, ∞) B. (4, 2) È (2, ∞) C. (∞, 2) È (2, 9) D. (4, 2) È (2, 4)

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satellite73
 one year ago
Best ResponseYou've already chosen the best response.0does it help to know that \[ x^3 + 4x^2 – 4x – 16=(x+4)(x+2)(x2)\] so your being asked to solve \[(x+4)(x+2)(x2)>0\]
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