Unit Test — Unit test

Question 1

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

Revolt · Accepted Answer

(–1 + 21) + (i + 5i)

Question 2

Which statement about the following equation is true?2x2 – 9x + 2 = –1

Revolt · Accepted Answer

The discriminant is greater than 0, so there are two real roots.

Question 3

If x2 + mx + m is a perfect-square trinomial, which equation must be true?

Revolt · Accepted Answer

x2 + mx + m = (x + 2)2

Question 4

What is the distance from the origin to point P graphed on the complex plane below?

Revolt · Accepted Answer

StartRoot 29 EndRoot

Unit Test — Unit test Answers