Question

Verify (a + b) + C =a + (b + c) for each of the following:
(a) a=-2, b=9,c=-18​

Answer 1

Step-by-step explanation:

(a + b) + c = a + (b + c)

for a = -2 , b = 9 , c = - 18

(-2 + 9) + [-18] = -2 + (9 + [-18])

7 - 18 = -2 + (9 - 18)

-11 = -2 - 8

-11 = -11

LHS = RHS

Answer 2

Answer:

Please find the attached image.

Step-by-step explanation: