Question

Сократить дробь ; 6x/x^2+6x. A^2/a-3-9/a-3

Answer 1

$frac{6x}{x^2+6x}=frac{6x}{x(x+6)}=frac{6}{x+6}$
--------
$frac{a^2}{a-3}-frac{9}{a-3}=frac{a^2-9}{a-3}=\\frac{a^2-3^2}{a-3}=\\frac{(a-3)(a+3)}{a-3}=a+3$