Question

\left[ \begin{matrix} 4 & -2 \\ -7 & 2 \end{matrix}\right] X=\left[\begin{matrix} -6\\12 \end{matrix} \right]

Answer 1

\[\left[ \begin{matrix} 4 & -2 \\ -7 & 2 \end{matrix}\right] X=\left[\begin{matrix} -6\\12 \end{matrix} \right]\]

Answer 2

\[\left[\begin{matrix} 4& -2\\-7&2 \end{matrix}\right]\]

Answer 3

close the \left[

Answer 4

yep I forgot to do that earlier :S
I know I have to find the inverse somehow...where do I start?

Answer 5

oh i was just going to solve like a donky
\[4x_1-2x_2=-6\]\[-7x_1+2x_2=12\]

Answer 6

this one is pretty easy, add and get
\[3x_1=-6\implies x_1=-2\] etc

Answer 7

would we get
-2
-1