When is a Rational Expression Undefined or Zero?


Related Topics:
More Lessons for Grade 9 Math
Math Worksheets




Share this page to Google Classroom

Examples, solutions, videos, worksheets, and activities to help Algebra students learn about rational expressions.

When is a rational expression undefined?
A fraction with a denominator of zero is undefined.
Similarly, a rational expression with a denominator of zero is undefined.
To find the values that make a rational expression undefined, we set the denominator equal to zero and solve the resulting equation.

When is a rational expression zero?
A rational expression is zero when the numerator is zero.
To find the values that make a rational expression zero, we set the numerator equal to zero and solve the resulting equation.

Rational Expressions - When is it undefined?

For what values of x is the rational expression undefined?




Rational Expression- When is it zero?



Try out our new and fun Fraction Concoction Game.

Add and subtract fractions to make exciting fraction concoctions following a recipe. There are four levels of difficulty: Easy, medium, hard and insane. Practice the basics of fraction addition and subtraction or challenge yourself with the insane level.

Fraction Concoction Game



We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.