Precalculus Examples

$f (x) = \frac{2 x^{2} + 6 x - 80}{x - 5}$ , $x = 5$

Step 1

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

$f (5) = \frac{2 {(5)}^{2} + 6 (5) - 80}{(5) - 5}$

Step 2

Subtract $5$ from $5$ .

$f (5) = \frac{2 {(5)}^{2} + 6 (5) - 80}{0}$

Step 3

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

Undefined