1. Equations & Inequalities

In Exercises 9–20, find each product and write the result in standard form. (- 5 + 4i)(3 + i)

Identify each number as real, complex, pure imaginary, or nonreal com-plex. (More than one of these descriptions will apply.) -6 -2i

Perform each operation. Write answers in standard form. (6-i) + (7-2i)

In Exercises 21–28, divide and express the result in standard form. 2/(3 - i)