Stream of discoveries, gadgets, engineering marvels, and farsighted contrivances are poured by fecund imaginations of both Leonardo and Newton. Newton invented the reflecting telescope, Leonardo the helicopter; Newton, the binomial theorem, Leonardo, the parachute, submarine, and tank. So Newton's discoveries were expressed in equations. The theory of equations is a traditional course of mathematics which deals with the theory and solutions of polynomial and linear equations. The practical application of this subject has its greatest contribution to humankind to grow in an intense curiosity about the mathematical modeling. This book deals with the formation of equations and their corresponding solutions in accordance with numerical computation.