Solve the Problem $f ( x ) = x ^ { 2 } + 15 x$

question 140

Multiple Choice

Solve the problem.
-Let $f ( x ) = x ^ { 2 } + 15 x$ . Find all values $x$ for which $f ( x ) = - 54$ .

• A) \(0 , - 54\)
• B) 9,6
• C) \(- \frac { 5 } { 18 } , - \frac { 1 } { 54 }\)
• D) \(- 9 , - 6\)

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Definitions:

Sudden Infant Death Syndrome

A mysterious and tragic condition where an apparently healthy infant dies unexpectedly, usually during sleep, and without a clear cause.

Medulla

A part of the brain stem that regulates vital and automatic functions such as breathing and the sleep-wake cycle.

Serotonin

A neurotransmitter that is involved in mood disorders such as depression.

Sudden Infant Death Syndrome

An unexplained death, usually during sleep, of a seemingly healthy baby less than a year old, also known as crib death.