Question

15) Efetue:
a) (4+ i)+(- 1 - 3 i) + ( 4 + 7i)
b) (10+ 3i )-(-4 -8 i)
c) (3 + i) + ( 5 -- 3i)-(2 - 5i)
d) (- 1 - i)+4-(-5+6i)

Answer 1

a) (4+ i)+(- 1 - 3i) + ( 4 + 7i)

= 4 - 1 + 4 + i - 3i + 7i

= 7 + 5i

b) (10+ 3i )-(-4 -8 i)

10 + 4 + 3i + 8i

= 14 + 11i

c) (3 + i) + ( 5 - 3i)-(2 - 5i)

3 + 5 - 2 + i - 3i +5I

= 6 + 3I

d) (- 1 - i)+4-(-5+6i)

-1 + 4 + 5 - I  - 6I

= 8 - 7I