Question
Find alpha 4 when f of x equals 5x squared minus 5x + 7
Answers
GPT-4o mini
To find \( f(4) \) for the function \( f(x) = 5x^2 - 5x + 7 \), we substitute \( x = 4 \) into the function:
\[
f(4) = 5(4)^2 - 5(4) + 7
\]
Calculating \( 4^2 \):
\[
4^2 = 16
\]
Now substitute back into the equation:
\[
f(4) = 5(16) - 5(4) + 7
\]
Calculating \( 5(16) \) and \( 5(4) \):
\[
f(4) = 80 - 20 + 7
\]
Now combine the values:
\[
f(4) = 80 - 20 + 7 = 60 + 7 = 67
\]
Therefore, \( f(4) = 67 \).
\[
f(4) = 5(4)^2 - 5(4) + 7
\]
Calculating \( 4^2 \):
\[
4^2 = 16
\]
Now substitute back into the equation:
\[
f(4) = 5(16) - 5(4) + 7
\]
Calculating \( 5(16) \) and \( 5(4) \):
\[
f(4) = 80 - 20 + 7
\]
Now combine the values:
\[
f(4) = 80 - 20 + 7 = 60 + 7 = 67
\]
Therefore, \( f(4) = 67 \).