Penyelesaian
|A| = (5 . 1) – (4 . 2) = 5 – 8 = -3
Adj A =
A⁻¹ = 1 / |A| . ajd A
A⁻¹ = – 1 / 3 .
A⁻¹ =
Penjelasan dengan langkah-langkah:
A^-1 = 1/ad – bc
A^-1 = 1/(1 × 5) – (2 × 4) [5 (-2)]
[(-4) 1]
A^-1 = 1/(5 – 8) [5 (-2)]
[ (-4) 1]
A^-1 = -⅓ [5 (-2)]
[ (-4) 1]