Rational Expressions Restricted Values

In this lesson, we will learn how to find the restricted values for a rational expression. A rational expression is defined as the quotient of two polynomials where the denominator is not zero. Since variables will be involved in our fraction, we have to guard against division by zero. To do this, we set our denominator equal to zero and solve the resulting equation. The values that satisfy the equation make the denominator zero and must be excluded from our domain.