Answer:

9

Step-by-step explanation:

Given that a = 4, m = - 2 and n = - 1

[tex]4 {m}^{2} - 3a - 5n \\ \\ = 4 {( - 2)}^{2} - 3(4) - 5( - 1) \\ \\ = 4(4) - 12 + 5 \\ \\ = 16 - 12 + 5 \\ \\ = 21 - 12 \\ \\ = 9[/tex]