Question

Resolva as expressões: a) (-8+4i)-(7-i)+(12+7i) b) (7-3i)-(7i)+(8-i)-(10-i)

Answer 1

-8+4i-7+i+12+7i=
12i=+8+7-12
12i=3
i=12/3

+7-3i-7i+8i-i-10+i=
-3i-7i+8i+i-i=-10-7
-2i=-17
i=-17/2

Answer 2

Resposta:

a) (-8 + 4i) - (7 - i) + (12 + 7i)

-8 + 4i  - 7 + i + 12 + 7i

(-8- 7 + 12) + (4i + i + 7i)

- 3 + 12i

b) (7 - 3i) - (7i) + (8 - i) - (10 - i)

7 - 3i - 7i + 8 - i - 10 + i

7 + 8 - 10 - 3i - 7i - i + i

+ 5 - 10i

obs: - i + i = 0

bons estudos!