Unit Test — Unit test Answers

Which expression demonstrates the use of the commutative property of addition in the first step of simplifying the expression (–1 + i) + (21 + 5i)?

What is the modulus of 6 + 7i?

What is the midpoint of a segment in the complex plane with endpoints at 6 – 2i and –4 + 6i?

The first two steps in the derivation of the quadratic formula by completing the square are shown below. Which answer choice shows the correct next step?Step 1: Step 2:

What is the discriminant of ?

If f(x) = 1 – x, which value is equivalent to |f(i)|?

A circle has a diameter with endpoints at 3 – 5i and –8 + 2i. What is the center of the circle?

Melissa and Tomas are playing a game with complex numbers. If Melissa has a score of 5 – 4i and Tomas has a score of 3 + 2i, what is their total score?

What is the length of the radius of a circle with a center at the origin and a point on the circle at 8 + 15i?