Determine the Intervals for Which $x ^ { 2 } - 4 x - 45$

question 24

Multiple Choice

Determine the intervals for which $x ^ { 2 } - 4 x - 45$ is entirely negative and entirely positive.

• A)negative: \(( 5,9 )\) ; positive: \(( - \infty , 5 ) \cup ( 9 , \infty )\)
• B)negative: \(( - 5,9 )\) ; positive: \(( - \infty , - 9 ) \cup ( 5 , \infty )\)
• C)negative: \(( - 5,9 )\) ; positive: \(( - \infty , - 5 ) \cup ( 9 , \infty )\)
• D)negative: \(( 5,9 )\) ; positive: \(( - \infty , - 9 ) \cup ( 5 , \infty )\)
• E)negative: \(( - 9,5 )\) ; positive: \(( - \infty , - 9 ) \cup ( 5 , \infty )\)

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