Question

I need help solving this problem Multiply the first one

Answer 1

Given:

$\begin{bmatrix}{1} & {2} \\ {0} & {1}\end{bmatrix}\times\begin{bmatrix}{2} & {3} \\ {-1} & {4}\end{bmatrix}$

Simplifying we have:

$\begin{gathered} =\text{ }\begin{bmatrix}{1\times2+2\times-1} & {1\times3+2\times4} \\ {0\times2+1\times-1} & {0\times3+\text{ 1}\times4}\end{bmatrix} \\ =\text{ }\begin{bmatrix}{2-2} & {3+8} \\ {0-1} & {0+4}\end{bmatrix} \end{gathered}$

Simplifying further:

$=\text{ }\begin{bmatrix}{0} & {11} \\ {-1} & {4}\end{bmatrix}$

Answer:

$\begin{bmatrix}{0} & {11} \\ {-1} & {4}\end{bmatrix}$