Answer:
commutative property of addition
Step-by-step explanation:
3 + 4i + 5 + 6i = 3 + 5 + 4i + 6i
Commutative property of addition is
a+b = b+a
When we change the order of terms then the value does not change in commutative property of addition
In the given equation , the order of 4i and 5 is interchanged
that will not affect the final answer
So the equation is the commutative property of addition
