Math 11

Week 15- Adding and Subtracting Rational Expressions

This week, we continued with our unit on rational expressions and learned how to add and subtract rational expressions.

Review:

  • Finding the LCD
  • What you do to the bottom of a fraction, you have to do to the top as well
  • Only adding and subtracting the numerators

Steps:

  1. Factor the denominators if possible
  2. Determine the lowest common denominator
  3. Rewrite each fraction as an equivalent fraction with the lowest common denominator
  4. Combine numerators by adding and subtracting
  5. Reduce if possible

  • Remember to write out the non-permissive values
  • Remember that there is a negative coefficient infront of the second fraction, so it would get distributed

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