Answer:
first identify the like terms;
(2-7i)+(3+9i)
(2+3-7i+9i)
5+2i
5 + 2i
Step-by-step explanation:
1) Remove parentheses
2 - 7i + 3 + 9i
2) Collect like terms
(2 + 3) + (-7i + 9i)
3) Simplify
