Answer :

To solve the equation [tex]\( f^2 = 84 \)[/tex], we are looking for the value or values of [tex]\( f \)[/tex] that satisfy this equation. To find the solution, follow these steps:

1. Understand the Equation: The equation [tex]\( f^2 = 84 \)[/tex] means that we need to find a number [tex]\( f \)[/tex] which, when squared, results in 84.

2. Solving for [tex]\( f \)[/tex]: We can find [tex]\( f \)[/tex] by taking the square root of both sides of the equation. This gives us:

[tex]\[
f = \sqrt{84}
\][/tex]

and also considering the negative root:

[tex]\[
f = -\sqrt{84}
\][/tex]

3. Calculate the Square Roots: When you calculate the square root of 84, you will find two possible values for [tex]\( f \)[/tex]. The positive root is approximately 9.16515138991168, and the negative root is approximately -9.16515138991168.

4. Conclusion: The complete set of solutions for [tex]\( f \)[/tex] are:

[tex]\[
f \approx 9.16515138991168 \quad \text{or} \quad f \approx -9.16515138991168
\][/tex]

These are the possible values of [tex]\( f \)[/tex] that satisfy the original equation [tex]\( f^2 = 84 \)[/tex].