Multiple Choice Question (MCQ)
Simply \dfrac{12}{m^2-9}+\dfrac{2}{m+3} , the result is
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×
\dfrac{6}{m^2-9}
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×
\dfrac{2}{m-3}
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×
\dfrac{2}{m+3}
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×
\dfrac{2m+6}{m^2-9}
Answer
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\dfrac{12}{m^2-9}+\dfrac{2}{m+3}
=\dfrac{12+2m-6}{m^2-9}
= \dfrac{2(m+3)}{m^2-9}
=\dfrac{2}{m-3}