False position method double false position became a root-finding algorithm used in iterative numerical approximation techniques. Many equations, including most of the more complicated ones, can be solved only by iterative numerical approximation. This consists of trial and error, in which various values of the unknown quantity are tried. That trial-and-error may be guided by calculating, at each step of the procedure, a new estimate for the solution. There are many ways to arrive at a calculated-estimate and "regula falsi" provides one of these. Given an equation, move all of its terms to one side so that it has the form, , where
Midfielder as wingers behind a lone striker. In a three-man midfield, specialist wingers are sometimes deployed down the flanks alongside the central midfielder or playmaker. Even more demanding is the role of wing-back, where the wide player is expected to provide both defence and attack. As the role of winger can be classed as a forward or a midfielder, so this role blurs the divide between defender and midfielder. A winger is an attacking midfielder who is stationed in a wide position near the touchlines. Wingers such as Stanley Matthews or Jimmy Johnstone used to be classified as forwards in traditional