A cubic polynomial is of the form: f(x) = Ax^3 + Bx^2 + Cx + D
A root of the polynomial is a value, x, such that
f(x)=0.
Write a program that takes in the coefficients of a cubic
polynomial: A, B, C, and D. The program finds and reports all three
roots of the polynomial.
Hint: First use bisection method to determine a single root of
the polynomial. Then divide the polynomial by its factor to come up...