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Question
Simplify: `(a^2 + 5a + 6)/(a^2 - a - 12) xx (a - 4)/(a^2 - 4)`
Sum
Solution
`(a^2 + 5a + 6)/(a^2 - a - 12) xx (a - 4)/(a^2 - 4)`
`= ((a + 3)(a + 2))/((a - 4)(a + 3)) xx (a - 4)/((a + 2)(a - 2))`
`= 1/(a - 2)`
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