Question

3i(4 - I) + i(6 + 2i)

Answer 1

-1 + 18i

Explanation:

⟺ Distribute 3i and i in the expressions.

`12i-i^2+6i+2i^2\\i^2+18i`

⟺ The define of complex number is

`i^2=-1`

Thus, convert i² to -1

`-1+18i`