Question

How do I solve this problem 4i)(-8i)(5 + 5i)

Answer 1

Explanation:

(4i)·(-8i)·(5+5i) = 160+ 160i

We take into account that (i)² = -1

1)

(4i)·(-8i) = (-32)·i² = (-32)·(-1) = 32

2)

32·(5 + 5i) = 32·5 + 32·(5i) = 160 + 160 i