Jawabanmu

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2014-05-21T21:08:08+07:00
   limx⇒5  \frac{ x^{2}-x-20}{(x-5)}
= limx⇒5  \frac{(x-5)(x+4)}{(x-5)}
= limx⇒5 (x+4)
= 5+4
= 9