Question

Упростить выражение
$5a - frac{3+5a^{2} }{a+1}$

Answer 1

$5a- frac{3+5a^2}{a+1} = frac{5a(a+1)-3-5a^2}{a+1} = frac{5a^2+5-3-5a^2}{a+1} = frac{2}{a+1}$