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← Subtract Rational Expressions Practice 1 - Visualizing Algebra

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Showing Revision 2 created 05/25/2016 by Udacity Robot.

  1. To subtract this fraction, we're going to distribute this negative sign to every

  2. term in the numerator. We know subtraction is the same as adding the opposite.
  3. And in this case, we only had to change the sign of one term, the positive 3. If
  4. there were more terms in the numerator, we would want to change the sign or
  5. distribute the negative 1 to each of those terms. Now, we're in familiar
  6. territory. We know how to add two rational expressions with different
  7. denominators. First, we'll find the LCD, create equivalent fractions, and
  8. finally, add the numerators together and check to see if we can simplify. So,
  9. you give this one a shot. What would be the final answer?