Find the Inverse of the Matrix $\left[ \begin{array} { c c } 6 & 12 \\ - 18 & - 30 \end{array} \right]$

Multiple Choice

Find the inverse of the matrix $\left[ \begin{array} { c c } 6 & 12 \\ - 18 & - 30 \end{array} \right]$ .

A) $\frac { 1 } { 7 } \left[ \begin{array} { c c } 6 & 12 \\ - 18 & - 30 \end{array} \right]$
B) $\frac { 1 } { 6 } \left[ \begin{array} { c c } - 5 & - 2 \\ 3 & 1 \end{array} \right]$
C) $\left[ \begin{array} { c c } - 6 & - 12 \\ 30 & 18 \end{array} \right]$
D) $\left[ \begin{array} { c c } 6 & - 18 \\ 24 & - 42 \end{array} \right]$
E) $\frac { 1 } { 13 } \left[ \begin{array} { c c } - 6 & - 12 \\ - 18 & 30 \end{array} \right]$