Question

Which expression demonstrates the use of the commutative property of addition in the first step of simplifying the expression (–3 + i) + (18 + 5i)?

(–3 + i) + (18 + 5i) + 0
–3 + (i + 18) + 5i
(–3 + 18) + (i + 5i)
–(3 – i) + (18 + 5i)

Answer 1

Short answer is C.

Answer 2

The answer would be (-3+18) + (i +5i)

This is because changing the order of the numbers does not change the sum