Question

Which property of addition is shown below?

Answer 1

Answer: Last option

inverse property

Step-by-step explanation:

The property of the inverse sum says that if we have a number b and we add it with its negative -b then

$b - b = 0$

In this case we have that:

$x = a + bi$

and

$y = -b - bi$

Note that

$y = -x$

Therefore:

$x + y = x -x= a + bi - a - bi = 0$

the answer is the last option