Question

f(x)= -3+ 8x^2 A function is shown.
What is the value of `f\left(5\right)?`

is it 126

Answer 1

To evaluate \( f(5) \) for the function \( f(x) = -3 + 8x^2 \), we will substitute \( x = 5 \) into the function.

\[
f(5) = -3 + 8(5^2)
\]
First, calculate \( 5^2 \):
\[
5^2 = 25
\]
Now substitute that back into the equation:
\[
f(5) = -3 + 8(25)
\]
Next, calculate \( 8 \times 25 \):
\[
8 \times 25 = 200
\]
Now plug that value into the equation:
\[
f(5) = -3 + 200
\]
Finally, simplify:
\[
f(5) = 197
\]

So, the value of \( f(5) \) is \( 197 \), not \( 126 \).