Question

Why isn’t there any answer to this I need this or I have to do my grade over again and I don’t want to do that so please give me an answer for this

Answer 1

see below

Explanation:

When a = -1 and b = -2 U = a-b

-1 - -2 = 1 U =1

when a = -4 and b = 1 V = a-b = - 4 - 1 =-5 V = -5