Question

сократите дробь
$\frac{x^{2}+ 3xy}{x ^{2}-9 y^{2} }$

Answer 1

$\frac{x^2+3xy}{x^2-9y^2} = \frac{x(x+3y)}{(x+3y)(x-3y)} = \frac{x}{x-3y}$