Rational expressions are found in formulas used in trades and the sciences. For example, speed is a rational expression of distance over time, or \(\frac{d}{t}\). The volume of a cone can be written as the rational expression \(\frac{\pi r^2h}{3}\). Chemistry uses rational expressions when discussing concentration as the number of moles of solute over volume of solvent, \(\frac{n}{V}\).


In Lesson 5.1, you will

  • simplify rational expressions,
  • identify non-permissible values for rational expressions, and
  • determine equivalent rational expressions.