Answer:10-i
Step-by-step explanation:
(5-9i)+(5+8i)
remove brackets
5-9i+5+8i
Collect like terms
5+5-9i+8i
10-i
Answer:
2 and remains the same
Step-by-step explanation:
Answer:
It means direct sum.
Step-by-step explanation:
4a + 5(a-1)
4a + 5a - 5
9a - 5