Question

calcule o valor de x e y


pfvr me ajuda❤️​

Answer 1

Resposta:

Explicação passo-a-passo:

Temos que:

$2.\left[\begin{array}{cc}0&1\\-1&y\\\end{array}\right]-3.\left[\begin{array}{cc}x&-2\\3&0\\\end{array}\right]=\left[\begin{array}{cc}9&8\\-11&4\\\end{array}\right]=>\left[\begin{array}{cc}0&2\\-2&2y\\\end{array}\right]+\left[\begin{array}{cc}-3x&6\\-9&0\\\end{array}\right]=\left[\begin{array}{cc}9&8\\-11&4\\\end{array}\right]=>\left[\begin{array}{cc}-3x&8\\-11&2y\\\end{array}\right]=\left[\begin{array}{cc}9&8\\-11&4\\\end{array}\right]$

Assim, temos que:

-3x = 9 => x = 9/-3 => x = -3

2y = 4 => y = 4/2 => y = 2.