Calculus Examples

$f (4) = \frac{x^{2} + 3 x - 28}{x^{2} - 16}$

Step 1

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

$f (4) = \frac{{(4)}^{2} + 3 (4) - 28}{{(4)}^{2} - 16}$

Step 2

Raise $4$ to the power of $2$ .

$f (4) = \frac{{(4)}^{2} + 3 (4) - 28}{16 - 16}$

Step 3

Subtract $16$ from $16$ .

$f (4) = \frac{{(4)}^{2} + 3 (4) - 28}{0}$

Step 4

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

Undefined