The "cubic" \(x^3+2x^2-11x-12\) has three roots. What is their sum?
If you could explain how this was solved that would be great! Thankyou!
In the form ax^3 + bx^2 + cx + d
The sum of the roots is -b/a
So....in this case..... -2/1 = -2
+144 
