Question

5. 4i(-2 - 4i)
6.5i・i・-2i
7. (-5 - 0(1 + i)
Operations with Complex Numbers
help plz asap​

Answer 1

Answer:

$4i( - 2 - 4i) = - 8i + 16 \\ \\ 5i.i.( - 2i) = 10i \\ \\ (- 5 - i)(1 + i) = -5-5i-i+1\\=-4-6i$