Question

mano isso e urgenteeee​

Answer 1

Olá!

basta multiplicar cada termo da matriz por 5.

Fica assim:

$5\times A=\\ \\ \\ \\ 5\times\left[\begin{array}{cccc}1&3&7&4\\2&5&-1&0\\-3&4&5&-4\end{array}\right] ~~~~~~~~=~~~~~~\left[\begin{array}{cccc}5&15&35&20\\10&25&-5&0\\-15&20&25&-20\end{array}\right]$

:)