Question
Find the indicated outputs for f(x)equals3x squaredminus5x. f(negative 1)equals
Answers
GPT-4o mini
To find \( f(-1) \) for the function \( f(x) = 3x^2 - 5x \), we substitute \( -1 \) into the function:
\[
f(-1) = 3(-1)^2 - 5(-1)
\]
Calculating \( (-1)^2 \):
\[
(-1)^2 = 1
\]
Now substitute back into the function:
\[
f(-1) = 3(1) - 5(-1)
\]
\[
f(-1) = 3 - (-5)
\]
\[
f(-1) = 3 + 5
\]
\[
f(-1) = 8
\]
Thus, \( f(-1) = 8 \).
\[
f(-1) = 3(-1)^2 - 5(-1)
\]
Calculating \( (-1)^2 \):
\[
(-1)^2 = 1
\]
Now substitute back into the function:
\[
f(-1) = 3(1) - 5(-1)
\]
\[
f(-1) = 3 - (-5)
\]
\[
f(-1) = 3 + 5
\]
\[
f(-1) = 8
\]
Thus, \( f(-1) = 8 \).