In Exercises 1–8, add or subtract as indicated and write the result in standard form. 6 - (- 5 + 4i) - (- 13 - i)

In Exercises 1–8, add or subtract as indicated and write the result in standard form. 8i - (14 - 9i)

Simplify the given square root. $\(\sqrt{-75}\)$

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

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

Write each number as the product of a real number and i. -√-18

Simplify and write the result in standard form. √-49

Find each product or quotient. Simplify the answers. √-6 * √-2 / √3