Question

algueeem me ajudaaaaaaaaaaaa​

Answer 1

Resposta:

Olá!

Letra a.

Explicação passo-a-passo:

$\left[\begin{array}{ccc}1&4\\3&3\/\end{array}\right] . \left[\begin{array}{ccc}a\\b\/\end{array}\right] = \left[\begin{array}{ccc}6\\9\/\end{array}\right]$

$a+4b = 6$

$3a+3b=9$

$a+4b=6.(-3)$ ⇒$-3a-12b=-18$

$3a+3b=9$

$-9b=-9$

$9b=9$

$b=\frac{9}{9}$

$b=1$

$3a+3.1=9$

$3a+3=9$

$3a=9-3$

$3a=6$

$a=\frac{6}{3}$

$a=2$

Bons Estudos!