Question

ПОМОГИТЕ!!
х²-9/х-3=0​

Answer 1

$\cfrac{x^2-9}{x-3}=0\overset{x\neq 3}{\Leftrightarrow }x^2-9=0\Leftrightarrow (x-3)(x+3)=0\Leftrightarrow x+3=0\Rightarrow x=-3$