Question

Multiply and simplify the product. 2i(4 – 5i)

Answer 1

10 + 8i.

Explanation:

2i(4 – 5i) Distribute the 2i:

= 2i*4 + 2i * -5i

= 8i - 10i^2 Note i^2 = - 1 so we have:

8i - 10* -1

= 8i + 10

= 10 + 8i.