Addition and Subtraction of Rational Expressions

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What must be the first step in adding and subtracting dissimilar rational expressions ?

• Combine like terms in the numerators.

• Determine a Least Common Denominator.

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

It can be written in the form P/Q where P and Q are both polynomials and Q is not equal to 0.

• Expressions

• Decimal expressions

• Rational expressions

• Percentage

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• k = 7
• x = 7.1
• x = 7.6
• x = 1/7

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