- #1
Regtic
- 75
- 3
This is a very basic question that I've been too embarassed to ask my elementary linear algebra teacher this far into the course:
Lets say we have a matrix
[tex]
\begin{pmatrix}
1 & 2 \\
2 & 1 \\
\end{pmatrix}
[/tex]Why can't we do something like ##R_2 - 2R_1## and ##R_1 - \frac {1}{2} R_2## at the same time? We would be multiplying each row by a multiple of the other. My teacher always does more than one row operation at a time. What is it that I'm missing?
Lets say we have a matrix
[tex]
\begin{pmatrix}
1 & 2 \\
2 & 1 \\
\end{pmatrix}
[/tex]Why can't we do something like ##R_2 - 2R_1## and ##R_1 - \frac {1}{2} R_2## at the same time? We would be multiplying each row by a multiple of the other. My teacher always does more than one row operation at a time. What is it that I'm missing?
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