Question

Aduceti expresia la o forma mai simpla:E(x)=3x-9supra x patrat-9 inmultit cu x patrat+6x+9 supra x patrat+5x+6.Sper ca se intelege.Ajutoor,va rog.

Answer 1

$\frac{3x-9}{ x^{2} -9}* \frac{x^2+6x+9}{ x^{2} +5x+6}= \frac{3(x-3)}{(x-3)(x+3)}* \frac{(x+3)^2}{(x+2)(x+3)}= \frac{3}{x+2}$