Question

I need help solving this problem Multiply the first one

Answer 1

Given:

`\begin{bmatrix}{1} & {2} \\ {0} & {1}\end{bmatrix}*\begin{bmatrix}{2} & {3} \\ {-1} & {4}\end{bmatrix}`

Simplifying we have:

`\begin{gathered} =\text{ }\begin{bmatrix}{1*2+2*-1} & {1*3+2*4} \\ {0*2+1*-1} & {0*3+\text{ 1}*4}\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}`