Question

Упростите выражение
$frac{a^2-25}{4a^2} * frac{8a}{a+5}$

Answer 1

$frac{(a-5)(a+5)}{4a^2}* frac{8a}{(a+5)} = frac{(a-5)}{a} * frac{2}{1} = frac{2(a-5)}{a}$

Answer 2

$frac{a ^{2}-25 }{4 a^{2} } * frac{8a}{a+5} = frac{(a-5)(a+5)*8a}{4a ^{2} (a+5)}= frac{2a-10}{a}$