Calculus Examples

$f (4) = \frac{x^{2} - 2 x - 8}{x - 4}$

Step 1

Replace the variable $x$ with $4$ in the expression.

$f (4) = \frac{{(4)}^{2} - 2 \cdot 4 - 8}{(4) - 4}$

Step 2

Subtract $4$ from $4$ .

$f (4) = \frac{{(4)}^{2} - 2 \cdot 4 - 8}{0}$

Step 3

The expression contains a division by $0$ . The expression is undefined.

Undefined