Algebra Examples

$f (x) = \frac{x^{2} + 3 x - 28}{x + 7}$

Step 1

Set the denominator in $\frac{x^{2} + 3 x - 28}{x + 7}$ equal to $0$ to find where the expression is undefined.

$x + 7 = 0$

Step 2

Subtract $7$ from both sides of the equation.

$x = - 7$

Step 3