How to Add or Subtract Rational Expressions with the Same Denominator

How to Add or Subtract Rational Expressions with the Same Denominator thumbnail
Add or Subtract Rational Expressions with the Same Denominator

A simple example of how to add or subtract rational expressions with the same denominator.

Things You'll Need

  • An equation
  • Paper
  • Pencil
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Instructions

  1. Instructions

    • 1
      equation

      Start with your equation. Use this simple one as an example.

    • 2
      grouped numerators

      Group the numerators together above the common denominator.

    • 3
      numerator functions performed

      Perform the numerator functions.

    • 4
      simplified expressions

      Simplify the resulting rational expression, if possible.

    • 5
      finished equation

      You are done when the rational expression cannot be simplified any further.

Tips & Warnings

  • always use a pencil so that you can erase your errors

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  • Photo Credit John Gugie

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