kak tolong jawablah kak.bingung lah kak

Kelas 10 Matematika
Bab Matriks

A^-1 =
(4 ... 2)
(3 ... 1)

(A^-1)^(-1) = A

1/(4 . 1 - 2 . 3) . (1 ... -2)
........................... (-3 ... 4)

= 1/(4 - 6) . (1 ... -2)
................... (-3 ... 4)

= (-1/2) . (1 ... -2)
................(-3 ... 4)

= (-1/2 ... 1)
... (3/2 ... -2)