Texas Instruments TI-84 PLUS SILV Guidebook - Page 151
Getting Started: Systems of Linear Equations
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6. Press Í to store the matrix to [C]. In the matrix editor (y Q), you can see that matrix [C] has dimension 2x2. You can press ~ ~ to display the EDIT screen and then select [C] to edit it. Getting Started: Systems of Linear Equations Getting Started is a fast-paced introduction. Read the chapter for details. Find the solution of X + 2Y + 3Z = 3 and 2X + 3Y + 4Z = 3. On the TI-84 Plus, you can solve a system of linear equations by entering the coefficients as elements in a matrix, and then using rref( to obtain the reduced row-echelon form. 1. Press y . Press ~ ~ to display the MATRX EDIT menu. Press 1 to select 1: [A]. 2. Press 2 Í 4 Í to define a 2×4 matrix. The rectangular cursor indicates the current element. Ellipses (...) indicate additional columns beyond the screen. 3. Press 1 Í to enter the first element. The rectangular cursor moves to the second column of the first row. Chapter 10: Matrices 144