Question

20/20
$f(x)=x^2-5x$
$f(4)=$
-4
126
24
84

Explanation:

Step1: Substitute $x=4$ into $f(x)$

$f(4) = 4^2 - 5\times4$

Step2: Calculate powers and multiplication

$f(4) = 16 - 20$

Step3: Compute final subtraction

$f(4) = -4$

Answer:

-4