Question

What ia A inverse if A = (3 -2)

(3 2)

Answer 1

for

a b
c d

for a denominator let k = ad - bc
If k is zero, there is no inverse

k = 6 - (-6) = 12

the inverse is

d -b
-c a times 1/k

we would ge
(1/12) times the matrix

2 2
-3 3