**Newton's Method**, also known as **Newton-Raphson method**, named after Isaac Newton and Joseph Raphson, is a popular iterative method to find a good approximation for the root of a real-valued function *f(x) = 0.* It uses the idea that a continuous and differentiable function can be approximated by a straight line tangent to it.

This is a companion discussion topic for the original entry at http://iq.opengenus.org/newton-raphson-method/