Question

Calcule os valores de X abaixo 

$\left[\begin{array}{ccc}-4&x&\\2&-1&\1\end{array}\right]$ =$\left[\begin{array}{ccc}22&-5&\\-10&x+4&\\&&\end{array}\right]$

Answer 1

Boa noite,

se as matrizes são iguais, logo os elementos contidos nelas são iguais:

$x=-5~~~~~~~~~~~~~~~~-1=x+4~\\ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~x+4=-1\\ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~x=-1-4\\ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~x=-5$

Tenha ótimos estudos =))