Solving Rational Equalities
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Lesson Summary:
In this lesson, you learn how to solve rational equations by multiplying until you get rid of the denominators. By using this method, we can get to the answer faster than using other methods like factoring or graphing. However, we still need to use older methods to solve the equation once it is no longer rational. To get more accurate answers, using the quadratic formula may be required instead of just relying on the calculator.
Lesson Description:
Learn how to solve equations with variables in the denominator of fractions.
Questions answered by this video:
- How do you solve rational equalities in trigonometry?
- How do you solve 4/(b-3) + 3/b = -2b/(b-3)?
- How do you get rid of fractions in a rational equation?
- How do you solve 2b^2 + 7b - 9 = 0 using the quadratic formula?
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Staff Review
This is a very difficult concept for many students, and is very important to watch. This technique of getting rid of fractions is useful in many math problems. Also, this problem is a quick review of solving a quadratic equation.
