Question

What is the sum of the roots of the polynomial shown below?

F(x)=3x^3+12x^2+3x-18

Answer 1

F(x)=(x-1)(3x^2+15x+18)=3(x-1)(x+2)(x+3) roots: x=1,-2,-3
sum of these is -4 (why do you want the sum?)

Answer 2

Thats what the question says... (the sum)

Answer 3

ax^3+bx^2+cx+d=0
roots x1, x2, x3
then x1+x2+x3=-b/a
so x1+x2+x3=-12/3=-4

Answer 4

sum of roots=-(12/3)=-4