Find All Real Values Of $x$ Such That $f ( x ) = 0$

question 33

Multiple Choice

Find all real values of $x$ such that $f ( x ) = 0$ .
$$f ( x ) = 49 x ^ { 2 } - 64$$

• A) \(\pm \frac { 7 } { 8 }\)
• B) \(\pm \frac { 8 } { 7 }\)
• C) \(\pm \frac { 64 } { 49 }\)
• D) \(- \frac { 64 } { 49 }\)
• E) \(\frac { 8 } { 7 }\)

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Definitions:

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Sleep that is frequently interrupted, leading to a lack of restful and restorative sleep.

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The involvement of a child or adult in sexual activity that they do not understand or cannot give informed consent to.