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Wednesday 24th of May
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 Depdendent Variable

 Number of equations to solve: 23456789
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 Dependent Variable

 Number of inequalities to solve: 23456789
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# Adding or Subtracting Rational Expressions with Different Denominators

Example

Subtract:

 Solution Step 1 Find the LCD. Factor each denominator. The second fraction can be simplified by canceling the common factor of w. The LCD is (w + 2)(w - 1). Step 2 Rewrite using the LCD. Multiply the second fraction by The first fraction already has the LCD as its denominator. So, we do not need to multiply it by anything. Remove the parentheses in the numerator. Step 3 Subtract. When simplifying -(w - 1), remember to distribute the negative sign to both terms inside the parentheses. The result is -w - 1. Distribute the negative sign to remove parentheses. Combine like terms. Step 4 Reduce. There are no common factors to reduce. So, the result is .