Question

Помогите пж даю 15 баллов ​

Answer 1

$3x^2+9x+6=a(x-x_1)(x-x_2)\\3x^2+9x+6=0\\D=81-4\cdot3\cdot6=9\\\left.\begin{array}{cc}x_1=\frac{-9-\sqrt D}6=-2&x_2=\frac{-9+\sqrt D}6=-1\end{array}\right.\\3(x+2)(x+1)$