# How do you evaluate the function f(x) =x^2- 7x + 10 and g(x)=1-x^2  for f(5)?

$f \left(5\right) = 0$
$\text{to evaluate "f(5)" substitute x = 5 into } f \left(x\right)$
$f \left(\textcolor{red}{5}\right) = {\left(\textcolor{red}{5}\right)}^{2} - \left(7 \times \textcolor{red}{5}\right) + 10$
$\textcolor{w h i t e}{\times x} = 25 - 35 + 10 = 0$