Question

( 2 x sobre 2 + 5x + 21 ) (x-5)

Answer 1

$(\frac{2x}{5x + 2 + 21} )(x - 5)$
=
$(\frac{2x}{5x + 23})( \frac{x - 5}{1} ) = \frac{2x ^{2}- 10x}{5x + 23}$