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January 28, 2015

January 28, 2015

Posted by **De'Ann** on Sunday, July 27, 2008 at 2:57pm.

- dividing monomials -
**drwls**, Sunday, July 27, 2008 at 4:37pmIt's easier to answer if you write it algebraically. Note that

x^2-49 = (x+7)(x-7)

Note also that dividing by

(x^2-49)^-1 is the same as multiplying by (x^2 -49) or(x+7)(x-7)

Therefore

1/(x+7)^2 * (x+7)(x-7) = (x-7)/(x+7)

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