Once the LCD is found rewrite each fraction in terms of the LCD—multiply each fraction by the ‘‘missing’’ factors over themselves. Then add or subtract the numerators.
Examples
LCD = (x + 3)(x – 1)(x
– 3)
The factor x – 3 is
‘‘missing’’ in the first denominator so multiply the first fraction by 
. An x _ 1 is ‘‘missing’’ from the second denominator so multiply the
second fraction by 
.
Practice
Solutions
Labels:
Mathematician
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