Question

simplificando a expressao x2+3x/x2-9

Answer 1

$\dfrac{x^2 + 3x}{x^2 - 9} \\ \\ \\ \dfrac{x(x + 3)}{(x - 3)(x + 3)} \\ \\ \\ \dfrac{x(\not x +\not 3)}{(x - 3)(\not x +\not 3)} \\ \\ \\ =\ \textgreater \ \dfrac{x}{x - 3}$