For the equation fx x3 9x2 64x 336 0 find the factors b

For the equation, f(x) = x^3 + 9x^2 - 64x - 336 = 0 find the factors by synthetic division. You are given that x = -12 is one factor. Find the other two by synthetic division.

Solution

F (x)=x^3 +9x^2-64x-336

F (x) = (x+4)(x-7)(x+12) is the factors of,

And solution is ,The roots are x= -12,-4,7.