Question

-i-(3-5i)=....
(2-3i)•(-I)=...
(2-3i)•(1+2i)=
(1-3i)(1+3i)=

Answer 1

1) -i - 3 + 5i = -3 + 4i

2) -2i + 3i² = -3 - 2i

3) 2 - 3i + 4i - 6i² = 8 + i

4) 1 - 9i² = 10