Question

Let z = 1 + 3i and w = −3 − 4i.

Answer 1

Answer:

1.) -2 - 1i

2.) -2 - 1i

3.) commutative

Explanation:

Given :

z = 1 + 3i

w = −3 − 4i

1.)

z + w :

1 + 3i + (-3 - 4i)

1 + 3i - 3 - 4i

1 - 3 + 3i - 4i

-2 - 1i

2.)

w + z

-3 - 4i + 1 + 3i

-3 + 1 - 4i + 3i

-2 - 1i

z + w = w + z

Hence, come number addition are commutative