# [C.18] Using rref on a graphing calculator

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Taught by TheMathDude
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Lesson Summary:

In this lesson, you will learn how to use the RF command on a graphing calculator to solve a system of equations written as an augmented matrix. By applying RF to the matrix, the calculator will put it in reduced row echelon form and allow you to read off the answer to the problem you're trying to solve. This skill is helpful for solving systems of linear equations and can simplify the process for you.

Lesson Description:

Learn how to use rref (reduced row echelon form) on a graphing calculator to solve a system of equations written as an augmented matrix.

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Questions answered by this video:
• What is rref (reduced row echelon form) and how do you use it to reduce a matrix on a TI graphing calculator?
• How do you use the MATH > rref( function on a TI graphing calculator and what does it do?
• #### Staff Review

• Currently 4.0/5 Stars.
This lesson will show you how to use reduced row echelon form on a TI graphing calculator (again, much easier on a calculator than by hand). This is very useful, especially once you get to higher math classes such as Linear Algebra.