Question

Let A = `[(1, -1, 2),(2, 1, 0)], B = [(0, 1, -1),(1, 2, 3)], C = [(-1, 2, 3),(0, 0, 1)]`

Find the following:

(A − B) − С

Answer 1

A − B = `[(1 - 0, -1 - 1, 2 - (-1)),(2 - 1, 1 - 2, 0 - 3)]`

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

Subtract C from (A − B)

(A − B) − С = `[(1, -2, 3),(1, -1, -3)] - [(-1, 2, 3),(0, 0, 1)]`

= `[(1 - (-1), -2 - 2, 3 - 3),(1 - 0, -1 - 0, -3 - 1)]`

= `[(2, -4, 0),(1, -1, -4)]`