Question

Simple matrix product.

Answer 1

Evaluate this in mod 5 arithmetic and uhh, explain why it do dat lol

$$ 4\begin{pmatrix} 1 & 1 & 1 & 1 \\ 1 & 3 & 4 & 2 \\ 1 & 4 & 1 & 4 \\ 1 & 2 & 4 & 3 \end{pmatrix}\begin{pmatrix} 1 & 1 & 1 & 1 \\ 1 & 2 & 4 & 3 \\ 1 & 4 & 1 & 4 \\ 1 & 3 & 4 & 2 \end{pmatrix}$$

Answer 2

\[4\left[\begin{matrix}4 & 10 & 10 & 9 \\ 10 & 29 & 25 & 30 \\ 10 & 25 & 34 & 25 \\ 10 & 30 & 25 & 29 \end{matrix}\right] = \left[\begin{matrix}16 & 40 & 40 & 36 \\ 40 & 116 & 100 & 120 \\ 40 & 100 & 136 & 100 \\ 40 & 120 & 100 & 116 \end{matrix}\right]\]



so mod5, would just be all of the numbers of the matrix, divided by 5, then replace them all with the remainder



atleast this is my best guess, You may need someone like @princeharryyy or @pooja195