Question

X la putere 2-9. Supra. X la a doua +5x+6

Answer 1

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