I want to make a Python program that will run a bisection method to determine the root of:
f(x) = -26 + 85x - 91x2 +44x3 -8x4 + x5
The Bisecti
You could see the solution in an earlier Stack Overflow question here that uses scipy.optimize.bisect. Or, if your purpose is learning, the pseudocode in the Wikipedia entry on the bisection method is a good guide to doing your own implementation in Python, as suggested by a commenter on the the earlier question.