Find the Inverse of the Matrix $\left[ \begin{array} { c c } 3 & 6 \\- 9 & - 15\end{array} \right]$

question 190

Multiple Choice

Find the inverse of the matrix $\left[ \begin{array} { c c } 3 & 6 \\- 9 & - 15\end{array} \right]$ .

• A) \(\frac { 1 } { 7 } \left[ \begin{array} { c c }
• 3 & 6 \\
• - 9 & - 15
• \end{array} \right]\)
• B) \(\frac { 1 } { 3 } \left[ \begin{array} { c c }
• - 5 & - 2 \\
• 3 & 1
• \end{array} \right]\)
• C) \(\left[ \begin{array} { c c }
• - 3 & - 6 \\
• 15 & 9
• \end{array} \right]\)
• D) \(\left[ \begin{array} { c c }
• 3 & - 9 \\
• 12 & - 21
• \end{array} \right]\)
• E) \(\frac { 1 } { 13 } \left[ \begin{array} { l l }
• - 3 & - 6 \\
• - 9 & 15
• \end{array} \right]\)

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