Question

Sendo então os valores de x e y para questao

Answer 1

Bom dia,

$A = \left[\begin{array}{cc}x&y&\\1&2&\end{array}\right]\\\\\\A^2 =\left[\begin{array}{cc}1&2&\\2&5&\end{array}\right]\\\\\left[\begin{array}{cc}x&y&\\1&2&\end{array}\right].\left[\begin{array}{cc}x&y&\\1&2&\end{array}\right] = \left[\begin{array}{cc}1&2&\\2&5&\end{array}\right]$

Realizando as multiplicações,

x + 2 = 2

x = 0

y + 4 = 5

y = 1

Portanto, S = {0,1}

Abraços!