Francisco E. answered • 07/01/14

Tutor

5
(1)
Francisco; Civil Engineering, Math., Science, Spanish, Computers.

Sorry to say this but I do not know a matrix mathematical method called Ti-84 calculator. Maybe the calculator does the solution based in any of the two methods that I know and will describe below. Matlab has another method of solving them but based in one of the two methods described below.

I will use any of the two known methods to solve this system by hand, one is the Gauss-Jordan elimination and the other is the Cramer rule.

In the first one you create the augmented matrix and then make the changes that you need to obtain the so called canonical form. the operations will be done in the rows until the matrix with three columns as diagonal ones is obtained.

The second system ( Cramer) is obtained by calculating the Determinant of the system and then replacing the x values of the system in the first row and doing [A1]/[A]. and so on. in this system is easier to obtain directly the answers obtained by the tutor that used the T1-84 calculator that I do not have and maybe some of the students don't.

If Kennedy wants I will develop the two manual systems in this answer.