Answer:
-8 +12i
Step-by-step explanation:
(1 + 9i)-(9 - 3i)
Distribute the minus sign
(1 + 9i)-9 + 3i
Combine like terms
1-9 +9i +3i
Steps to solve:
~Distribute negative sign to left side
(1 + 9i) - 9 + 3i
~Combine like terms
-8 + 12i
Best of Luck!
