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Ch 18: TASC Math: Rational Expressions

About This Chapter

Rational expressions become easier to work with after reviewing this chapter's effective lessons. Learn about solving equations of direct variation and more to help you prepare for the TASC Math test.

TASC Math: Rational Expressions - Chapter Summary

The TASC Math test includes problems that require familiarity with rational expressions. View the short video lessons and transcripts in this chapter to learn more about the following:

  • Multiplying, dividing, adding and subtracting rational expressions
  • Solving rational equations
  • Working with reciprocals of rational expressions
  • Simplifying complex expressions
  • Solving direct and inverse variation equations

The examples that our professional instructors include in the lessons are clear and easy and can help you process how to solve the same kinds of problems. Test your grasp of these topics before exam day with the chapter's self-assessment quizzes.

Objectives of the TASC Math: Rational Expressions Chapter

The TASC Math test is largely concerned with mathematical reasoning abilities, and it measures your understanding through different kinds of questions, including multiple-choice, gridded-response and constructed-response types. You have the option of taking the exam in either paper-based or computer-based formats.

The practice quizzes in this chapter have multiple-choice questions that give you a realistic preview of how some of your test questions could be. The TASC Math exam has five different content areas, and the topics in this chapter may be found within the algebra section. The algebra content area makes up 26% of the test.

10 Lessons in Chapter 18: TASC Math: Rational Expressions
Test your knowledge with a 30-question chapter practice test
How to Multiply and Divide Rational Expressions

1. How to Multiply and Divide Rational Expressions

Multiplying and dividing rational polynomial expressions is exactly like multiplying and dividing fractions. Like fractions, we will reduce. With polynomial expressions we use factoring and canceling. I also give you a little mnemonic to help you remember when you need a common denominator and when you don't.

Multiplying and Dividing Rational Expressions: Practice Problems

2. Multiplying and Dividing Rational Expressions: Practice Problems

Let's continue looking at multiplying and dividing rational polynomials. In this lesson, we will look at a couple longer problems, while giving you some practice multiplying and dividing.

How to Add and Subtract Rational Expressions

3. How to Add and Subtract Rational Expressions

Adding and subtracting rational expressions brings everything you learned about fractions into the world of algebra. We will mix common denominators with factoring and FOILing.

Practice Adding and Subtracting Rational Expressions

4. Practice Adding and Subtracting Rational Expressions

Adding and subtracting rational expressions can feel daunting, especially when trying to find a common denominator. Let me show you the process I like to use. I think it will make adding and subtracting rational expressions more enjoyable!

How to Solve a Rational Equation

5. How to Solve a Rational Equation

A rational equation is one that contains fractions. Yes, we will be finding a common denominator that has 'x's. But no worries! Together we will use a process that will help us solve rational equations every time!

Rational Equations: Practice Problems

6. Rational Equations: Practice Problems

Mario and Bill own a local carwash and have several complex tasks that they must use rational equations to solve for an answer. Enjoy learning how they solve these equations to help them with some of their day-to-day tasks.

Division and Reciprocals of Rational Expressions

7. Division and Reciprocals of Rational Expressions

In this video lesson, you will learn how to divide and take the reciprocal of any rational expression. Learn the one easy step you take to be able to find your answer quickly and easily.

Simplifying Complex Rational Expressions

8. Simplifying Complex Rational Expressions

When it comes to fractions, things may seem to get really complicated and scary when you have a fraction on top of a fraction. But never fear, after watching this video lesson, you will be able to simplify these expressions like a pro.

Solving Equations of Direct Variation

9. Solving Equations of Direct Variation

In the real world, we come across a lot of problems that vary directly with each other. You will learn how to solve these types of direct variation problems in this video lesson.

Solving Equations of Inverse Variation

10. Solving Equations of Inverse Variation

After watching this video lesson, you will be able to identify problems where you can use the formula for inverse variation to solve them. Learn what is involved and how easy they are to solve.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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