Question

(1;-2),(2,-3),(-3;4)

Answer 1

Ответ:

1) 1 -2 = -1

2) 2 -3 = -1

3) -3+4 = 1

Answer 2

1-2=-(2-1)=-1
2-3=-(3-2)=-1
-3+4=4-3=1