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Suppose  \(4\begin{bmatrix} -1 && 2 \\ 4 && 8 \end{bmatrix} = 3/4m X\begin{bmatrix} -1 && 2 \\ 4 && 8 \end{bmatrix} \)

and

\((H+\left [1, 4, -2 \right ])+[3, 2, −6] = [−2, 3, −1]+([1, 4,−2]+[3, 2, −6])\)

 

What matrix is the result of m×H ?

 

(edit: how do i find m and x?? i see each side of the = is similar but what now? I've asked three people and they said they never learned this. im so stuck and i cant move onto my next lesson without it)

 Oct 10, 2019
edited by Guest  Oct 11, 2019
 #1
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https://www.khanacademy.org/math/precalculus/x9e81a4f98389efdf:matrices/x9e81a4f98389efdf:multiplying-matrices-by-matrices/v/multiplying-a-matrix-by-a-matrix 

 

Watch this video it might help.

 Oct 11, 2019

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