111 12 2 01 a x a x b to carry out and demonstrate Gauss Elimintion procedure elimination of a21 from the second equation by using superposition and linear principles of linear equations is done by multiplying the second equation by a 1 and the first by a21 Show that the result is then aa x a 2x a b a a x a a x a b a Continue this calculation following the procedure demonstrated in lecture notes Chapter 3 and find the expessions for x2 and x successively in terms of the constants indicated by the members terms in matrix A a 1 a 2 az a Following the procedure elaborated in the Lecture Note Chapter 3 page 66 4 and following ones b If the first and second row of the system of linear equations a a 2 a21 a X are interchanged the equation becomes a2 x a 2x b a x a 2x b Continue following previous procedure and demonstrate verify that you will arrive at the expression ax a22 x b a a a 2 x a b a b find the expessions for x and x successively in terms of the constants indicated by the members terms of matrix A