Answer:
-56/9
Step-by-step explanation:
Let p and q be the roots of the equation.
So, here's how we're gonna work it out:

Vieta's formulas give us the sum and the product of the roots of a quadratic equation. Using them we obtain:
- p + q = -b / a = - 4 / 3
- p × q = c / a = 12 / 3 = 4

Answer: I don't believe i understand.
Step-by-step explanation:
3(x+4)=9
3x+12=9
3x=-3
x=-1
Hope this helps :D