Divide out all common factors to each polynomial. The denominator of the fraction can not equal zero. Set the factors or the monomial from the denominator of the original fraction equal to zero and solve to find the undefined terms.
Multiplying Rational Expressions
Dividing Rational Expressions
Dividing rational expressions is very similar to multiplying rational expressions. What you need to remember is when you divide fractions you need to keep , change, and flip.
Solving Rational Equations
Simplify the numerator and the denominator of the fraction if possible.
Cancel all common factors.
Solve the remaining equation for the variable.
Make sure the solution does not make the denominator of the original problem undefined. If it is does there is no solution to the problem.