Question

Olá, boa noite. Poderiam me ajudar nesta questão? É a ultima que me falta. *É sobre MATRIZES.​

Answer 1

Resposta:

Explicação passo a passo:

$\left(\begin{array}{cc}-x&2y\\5z&7w\end{array}\right) -\left(\begin{array}{cc}-4&3\\9&-1\end{array}\right) = \left(\begin{array}{cc}-1&0\\11&-22\end{array}\right)$

$\left(\begin{array}{cc}-x-(-4)&2y-3\\5z-9&7w-(-1)\end{array}\right) = \left(\begin{array}{cc}-1&0\\11&-22\end{array}\right)$

$\left(\begin{array}{cc}-x+4&2y-3\\5z-9&7w+1\end{array}\right) = \left(\begin{array}{cc}-1&0\\11&-22\end{array}\right)$

$-x +4 = -1 \rightarrow -x = -4-1 \therefore x = 5\\\\2y-3=0 \rightarrow 2y = 3 \therefore y = \dfrac{3}{2}\\\\5z-9 = 11 \rightarrow 5z = 20 \therefore z = 4\\\\7w+1 = -22 \rightarrow 7w = -23 \therefore w = -\dfrac{23}{7}$