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More Lessons for Algebra

Math Worksheets

**What is a Rational Expression?**

A rational expression is a fraction in which the numerator and/or the denominator are polynomials.

**How to Simplify Rational Expressions?**

In this lesson, we will look at simplifying rational expressions. A rational expression has been simplified or reduced to lowest terms if all common factors from the numerator and denominator have been canceled.

1. We first need to factor the polynomials

2. Cancel any common factors from the top and bottom of the rational expression.**Simplifying rational expressions - level 1**

Example:

Simplify

(4x^{3} + 8x^{2})/2x

**Simplifying rational expressions - level 2**

Example:

Simplify

(7x^{2} + 28x)/(x^{2} + 8x + 16)

**Simplifying rational expressions - level 3**

Example:

Simplify

(4x^{2} + 4x + 1)/(2x^{3} + 11x^{2} + 5x)

**How to write rational expressions in lowest terms?**

Step 1: Factor them

Step 2: Cancel to write in lowest terms

Give the domain of the expressions

Examples:

Simplify

a) (x + 2)/(x^{2} + 5x + 6)

b) (x^{2} + 2x - 15)/(x^{2} + x - 12)

**Rational Expressions: Writing in Lowest Terms**

How to reduce a rational expression involving a cubic polynomial and a quadratic polynomial?

Examples:

Simplify

(x^{3} + 1)/(x^{2} + 7x + 6)

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

More Lessons for Algebra

Math Worksheets

A rational expression is a fraction in which the numerator and/or the denominator are polynomials.

** For example: **

In this lesson, we will look at simplifying rational expressions. A rational expression has been simplified or reduced to lowest terms if all common factors from the numerator and denominator have been canceled.

1. We first need to factor the polynomials

2. Cancel any common factors from the top and bottom of the rational expression.

*Example: *

Simplify each of the following rational expressions:

*Solution: *

Example:

Simplify

(4x

Example:

Simplify

(7x

Example:

Simplify

(4x

Step 1: Factor them

Step 2: Cancel to write in lowest terms

Give the domain of the expressions

Examples:

Simplify

a) (x + 2)/(x

b) (x

How to reduce a rational expression involving a cubic polynomial and a quadratic polynomial?

Examples:

Simplify

(x

Rotate to landscape screen format on a mobile phone or small tablet to use the **Mathway** widget, a free math problem solver that **answers your questions with step-by-step explanations**.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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