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10-11-2021
Mathematics

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Use the function to answer the question.
f(x) = x2 – 16
What are the solutions for x when f(x) = 9?
A. x=4
B. x = 5
C. x=-4 or x = 4
D. X=-5 or x = 5

Respuesta :

AlgebraicAardvark AlgebraicAardvark

10-11-2021

if f(x) = x^2 -16 and you need to solve f(x) = 9, then your equation is:

x^2 - 16 = 9

This is solved as follows:

x^2 = 25

x = ± 5

The answer is D.

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