Question

Resolver a equacao matricial:  $\left[\begin{array}{ccc}a&b\\c&d\end{array}\right]$ $\left[\begin{array}{ccc}3&1\\-2&2\end{array}\right]$ = $\left[\begin{array}{ccc}5&7\\-5&9\end{array}\right]$

Answer 1

Boa tarde Lipedora

(a    b) ( 3   1) ( 5  7)
(c    d) (-2   2) (-5  9)

3a - 2b = 5 
  a +2b = 7
4a = 12
a = 3
9 - 2b = 5
2b = 9 - 5 = 4
b = 2

3c -  2d = -5
  c + 2d = 9 
4c = 4
c = 1

3 - 2d = -5
2d = 8
d = 4

resultado

(3  2)
(1  4)