Calculus Examples

$f (5) = \frac{x^{2} - 4 x - 5}{x - 5}$

Step 1

Replace the variable $x$ with $5$ in the expression.

$f (5) = \frac{{(5)}^{2} - 4 \cdot 5 - 5}{(5) - 5}$

Step 2

Subtract $5$ from $5$ .

$f (5) = \frac{{(5)}^{2} - 4 \cdot 5 - 5}{0}$

Step 3

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

Undefined