Question

Упростите:
(а-2/а+2 - а+2/а-2) + 12а/4-а2 =

Answer 1

$(\frac{a-2}{a+2} - \frac{a+2}{a-2}) + \frac{12a}{4- a^{2} }= \frac{ a^{2} -4a+4- a^{2}-4a-4 }{(a+2)(a-2)} - \frac{12a}{ a^{2}-4 }=- \frac{8a}{ a^{2}-4 } + \frac{12a}{ a^{2}-4 } =$$\frac{4a}{ a^{2} -4}$