How do you find the zeros of the function f(x)= x^3-x^2+1.3 ?

Question

How do you find the zeros of the function f(x)= x^3-x^2+1.3 ?

Answer 1

Tough one. I found a couple of sites that, together, will help you find the solution.

The first is an online graphing calculator. Plug in your equation, and you will see from the graph that there is a single root at approx. -0.84.

http://webgraphing.com/graphing_intermed...

Now you want the exact value for the root.

The second site gives you the general formula for finding the roots of a 3rd degree polynomial. Because you found from the first site that there is a single root, you only need apply the first formula.

Plus.. that fact that "a" and "b" are 1 and -1, respectively, and "c" is zero, will quickly reduce the formula to something more managable.

http://www.josechu.com/ecuaciones_polino...