Question

por favor me ajuda e pra agora 7:00 ☹️​

Answer 1

Resposta:

$\left[\begin{array}{ccc}a&3\\-1&a+b&\\\end{array}\right] =\left[\begin{array}{ccc}4&d-2c\\d+2c&-2\\\end{array}\right]$

a = 4

d - 2c = 3

d + 2c = -1

a + b = -2    → 4 + b = -2  →  b = - 6

d - 2c = 3

d + 2c = -1

__________

2d + 0 = 2

d = 1

d + 2c = -1

1 + 2c = -1

2c = -1 - 1

c = -2/2

c = -1

∴  a = 4

   b = - 6

   c = -1

   d = 1

bons estudos!