Question

Find the inverse (if it exists) of the following:

`[(-2, 4),(1, -3)]`

Answer 1

`[(-2, 4),(1, -3)]`

|A| = 6 – 4

= 2 ≠ 0

∴ A^-1 exists. A is non singular.

adj A = `[(-3, -4),(1, -2)]`

A^-1 = `1/|"A"|`

adj A = `1/2[(-3, -4),(1, -2)]`