Unit Test Answers

Which property allows you to write the expression (3 + 7i) + (8 – 6i) as (8 – 6i) + (3 + 7i)?

Which property allows you to write the expression [(3 + 7i) + (8 – 6i)] + (1+ 9i) as (8 – 6i) + [(3 + 7i) + (1 + 9i)]?

(3 − 5i) + (−2 + 8i) is .

The property allows 3i + 2i to be written as (3 + 2)i.

Subtract (5 – 2i) – (1 + 8i).Which property allows you to write the expression as 5 – 2i – 1 – 8i?

What is the additive inverse of –2 + 8i?

Which of the following is equivalent to –2i(6 – 7i)?

In general, ai + bi =

The difference is

(a + bi)(a – bi) = a2 – (bi)2 = a2 + b2 The product of a complex number and its complex conjugate is a real number.