Question

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$frac{a^{2}-4}{a}cdotfrac{1}{a+2}-frac{a+2}{a}$

Answer 1

 

$frac{(a-2)(a+2)}{a}cdotfrac{1}{a+2}-frac{a+2}{a}=frac{a-2}{a}-frac{a+2}{a}=-<var>frac{4}{a}</var>$

Answer 2

$frac{a^{2}-4}{a}cdotfrac{1}{a+2}-frac{a+2}{a}=frac{(a-2)(a+2)}{a}*frac{1}{a+2}-frac{a+2}{a}=frac{a-2}{a}-frac{a+2}{a}=-frac{4}{a}$