Question

select the function f(x)=x²−5. check the show values and integer x - values boxes. move the x - slider to find various values of the function. for what v
use the interactive figure to find your answer. use the left and right arrow keys to move along a slider as needed.
click here to launch the interactive figure.

select the correct choice below and, if necessary, fill in the answer box to complete your choice.
a. the value(s) of x when f(x)=4 is/are
(use a comma to separate answers as needed.)
b. there are no values of x for which f(x)=4.

Explanation:

Step1: Set function equal to 4

$x^2 - 5 = 4$

Step2: Isolate the squared term

$x^2 = 4 + 5$
$x^2 = 9$

Step3: Solve for x

$x = \sqrt{9}, \ x = -\sqrt{9}$
$x = 3, \ x = -3$

Answer:

A. The value(s) of x when f(x)=4 is/are $\{3, -3\}$.