Question

Simplificati fractia $\frac{ x^{3} -3 x^{2} -x+3}{9- x^{2} }$ , pentru x∈ R /(-3;3).

Answer 1

$\frac{ x^{2} (x-3)-(x-3)}{(3-x)(3+x)}$
$\frac{(x-3)(x-1)(x+1)}{(3-x)(3+x)}$
$\frac{-(x-1)(x+1)x}{(3+x)}$