10_Matrices_and_rref_row_reduced_echelon_form_TI84andTI84CE

This video shows how to quickly and easily enter a matrix into the TI-84 and TI-84 CE. It also shows how to solve a system of linear equations quickly using rref - Row Reduced Echelon Form. And how to convert ugly decimal answers to nice fractions. Finally, how to show that solutions actually check - especially when the soltuions are unusual fractions. To obtain a pdf with screenshots and step-by-step directions, go to bit.ly/ti84tips Time: 6 min