Subtracting Rational Expressions With Different Denominators

List the steps for the LCD Method in order from first to last step

• Factor the denominators, if possible

• Multiply the factors in the denominator, to get your LCD

• Figure out what each denominator needs to be exactly the LCD

• Multiply each fraction (top and bottom) by what it "needs"

• Distribute the numerators

Write one main concept that you must remember when adding/subtracting rational expressions with different denominators

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When adding or subtracting rational expressions, what must you first make sure is done.

• make sure all denominators are common denominators a

• make sure all numerators are common numeratorsb).

• make sure all denominators are different

• make sure all numerators are different d

When adding and subtracting rational expressions, my first step should be to:

• Combine like terms in the numerators.

• Determine a Least Common Denominator.

• Factor all of the numerators and all of the denominators.

• Change the operator to multiplication and reciprocate the second fraction.

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• B
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• D

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• D

Perform the operation

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• B

• C

• D

• A

• B

• C

• D

Hint: Factor first

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