SOLUTION: Use elementary row operations to write the matrix below in row echelon form. [1,-2,-9,6] [1,-2,-5,2] [1,2,15,-14]

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Question 471729: Use elementary row operations to write the matrix below in row echelon form.
[1,-2,-9,6]
[1,-2,-5,2]
[1,2,15,-14]
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
%28matrix%283%2C4%2C1%2C-2%2C-9%2C6%2C1%2C-2%2C-5%2C2%2C1%2C2%2C15%2C-14%29%29
~%28matrix%283%2C4%2C1%2C-2%2C-9%2C6%2C0%2C0%2C4%2C-4%2C0%2C4%2C24%2C-20%29%29, after -R1 + R2 and -R1 + R3;
~%28matrix%283%2C4%2C1%2C-2%2C-9%2C6%2C0%2C4%2C24%2C-20%2C0%2C0%2C4%2C-4%29%29, after R2<->R3
~%28matrix%283%2C4%2C1%2C-2%2C-9%2C6%2C0%2C1%2C6%2C-5%2C0%2C0%2C1%2C-1%29%29, after R2/4 and R3/4