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 ?