Question

Let `A = [(2, 4),(3, 2)], B = [(1, 3),(–2, 5)], C = [(–2, 5),(3, 4)]`

Find 3A – C

Answer 1

`3A - C = 3 [(2, 4),(3, 2)] - [(-2, 5),(3, 4)]`

= `[(3 xx 2, 3 xx 4),(3 xx 3, 3 xx 2)] - [(-2, 5),(3, 4)]`

= `[(6, 12),(9, 6)] - [(-2, 5),(3, 4)]`

= `[(6 + 2, 12 - 5),(9 - 3, 6 - 4)]`

= `[(8, 7),(6, 2)]`