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Q: In order to subtract two rational expressions by simply subtracting the numerator you must make sure what is equal?
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In order to subtract two rational expressions by simply subtracting their numerators you must make sure that their?

In order to subtract two rational expressions by simply subtracting their numerators you must make sure that their denominators are equal.


What do you subtract when you have two rational expressions that have a common denominator?

When subtracting you have to make sure that the second numerator is multiplied by -1 so the equation turns into adding. When you add and you already have a common denominator you add the numerators and leave the denominator the same.


When adding or subtracting fractions do you change the numerator?

you subtract the numerator but the denominator stays the same.


How is doing operations with rational expressions similar or different from doing equations with fractions and how can they be used in real life?

How is doing operations (adding, subtracting, multiplying, and dividing) with rational expressions similar to or different from doing operations with fractions?If you know how to do arithmetic with rational numbers you will understand the arithmetic with rational functions! Doing operations (adding, subtracting, multiplying, and dividing) is very similar. When you areadding or subtracting they both require a common denominator. When multiplying or dividing it works the same for instance reducing by factoring. Operations on rational expressions is similar to doing operations on fractions. You have to come up with a common denominator in order to add or subtract. To multiply the numerators and denominators separated. In division you flip the second fraction and multiply. The difference is that rational expressions can have variable letters and powers in them.


How is subtracting fraction when numerator and denominator is the same?

If the numerator and denominator are the same, the fraction simplifies to 1. And you should be able to subtract 1!


To subtract two rational expressions that have a common denominator You simply?

You subtract the numerators, and place it over the common denominator.


After you add or subtract two rational expressions it's a good idea to see if you can your answer?

reduce


After you add or subtract two rational expressions the next step is to put your answer in form?

reduced form $ara ;)


After you add or subtract two rational expressions its a good idea to see if you can your answer?

You should check whether you can simplify the answer.


How do you subtract mixed fractions when they have the same denominator?

The numerator of the answer is the result of subtracting the numerators of the fractions, and the denominator of the fraction is the same as the common denominator.


How will you subtract similar fraction?

subtracting similar fractions is just like adding them. You only subtract the numerator (top part) and then copy the denominator (bottom part). 4/5 - 1/5 = 3/5


To subtract two rational expressions that have a common denominator you simply the numerators?

Yes, eg 13/17 - 4/17 = 9/17