Question

(y+6) (y-6).. me ajudem

Answer 1

$(y+6) (y-6)\\\\ y^2-6y+6y-36=0\to\\\\ y^2-36=0\to \\\\ y^2=36\to \\\\ y=\pm \sqrt{36} \to \\\\ y=\pm6\\\\\\ S=(-6;6)$