Use Elementary Row Operations to Write the Matrix Below in Row

question 91

Multiple Choice

Use elementary row operations to write the matrix below in row echelon form. $$\left[ \begin{array} { c c c c } 1 & 2 & 1 & - 9 \\3 & 2 & 3 & - 27 \\2 & 0 & 4 & - 26\end{array} \right]$$

• A) \(\left[ \begin{array} { c c c c }
• 1 & - 4 & - 5 & 0 \\
• 0 & 1 & 4 & - 1 \\
• 0 & 0 & 1 & 1
• \end{array} \right]\)
• B) \(\left[ \begin{array} { c c c c }
• 1 & 2 & 1 & - 9 \\
• 0 & 1 & - 1 & 4 \\
• 0 & 0 & 1 & - 4
• \end{array} \right]\)
• C) \(\left[ \begin{array} { c c c c }
• 1 & - 4 & 0 & - 5 \\
• 0 & 1 & 4 & - 1 \\
• 0 & 0 & 1 & 1
• \end{array} \right]\)
• D) \(\left[ \begin{array} { c c c c }
• 1 & - 4 & - 5 & 0 \\
• 0 & 1 & - 1 & 4 \\
• 0 & 0 & 1 & 1
• \end{array} \right]\)
• E) \(\left[ \begin{array} { l l l l }
• 1 & 2 & 1 & - 9 \\
• 0 & 1 & 4 & - 1 \\
• 0 & 0 & 1 & - 4
• \end{array} \right]\)

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