Describe two real-life examples where rational expressions are used at home. For ideas, look in the textbook or online and look around you at home and see what strikes you as being similar in your own life. What examples do you see? Describe two o


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Meg Hayes answered
There are not many examples of when rational expressions are used every day in normal situations. However, learning this form of algebraic equation is not completely useless for people who wish to go into careers such as:

• Chemistry where rational expressions will be useful for analyzing.
• Physics and topics such as Optics.
• Aerodynamics and others.
• Molecular studies.
• Biochemistry etc.

People who study and work in these fields and many more have to use rational expressions and dozens of other algebraic equations every day.

Solving rational equations is relatively easy to do, once you know the method and calculations involved, and all you will need is a pen or pencil, paper and a calculator.

To add or subtract two rational expressions, follow the instructions below:

• Find the common denominator for the two expressions, if the denominators are not already the same. This usually involves finding a number that they will both multiply into.
• Subtract or add the numerators.
• Simplify the answer to its lowest possible denominator (if possible).

Simplifying rational expressions can be a little bit more tricky:

• The first thing you need to do is all to do with the numerator. You need to factor the polynomials that you are given into the numerator.
• Then you will have to do the same for the denominator.
• Once you have done both, simply cancel them out.

The final thing you can do with rational expressions is to multiply and divide them:

• The first step is to factor the rational expressions that you are given.
• The simply multiply them.
• This final step is tricky. You will need to divide the two rational expressions but to do this you must multiply the first expression by the reciprocal value of the second.
• Complete the equation by multiplying the fractions.

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