by augmenting An by column b [K]. The matrix containing the coefficients and constants of the system (1.1) is called the augmented matrix of the system and the equation (1.5) is called the augmented matrixequation of the system [S]. The augmented matrix equation (1.5) determines the system (1.1) completelysince it contains all the numbers in the system [K]. The rows of any augmented matrix equation can be treated just like the equations of the corresponding system of linear equations. So, performing elementary row operations on the augmented matrix of a system does not alter its solution.
The notation of determinant arises whenever the unknowns of a system of linear equations are eliminated[Da].This term, though impractical in computations , has valuable applications in eigenvalue problems,differential equations, vector algebra, optimization, and so on [K, Do, E]. Now a determinant is an array of numbers written as a square, and denoted by two vertical lines enclosing the array.The determinant of the n _ n matrix An (1.2), called an nth order determinant, is denoted as