Question

Помогите!
$lim_{x to 3} frac{x^{2}-9}{x-3}$

Answer 1

вид 0/0

limx->3 (x^2-9)/x-3=limx->3 ((x-3)(x+3))/x-3=limx->3 (x+3)=3+3=6

Answer 2

(x-3)(x+3)/(x-3)= x+3=3+3=6