Complex Numbers Notes Quiz

Simplify.

• -5i
• 5
• 5i
• -5

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

CCSS.HSN.CN.B.4

√(-300)

• 10i√3
• 15√15
• -10√3
• 2i√13

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

Another way to express √-1 is?

• 1

• -1

• i

• 0

Tags

CCSS.HSN.CN.A.1

A complex number can be expressed as a + bi. What does a represent?

• the real part of the complex number

• the imaginary part of the complex number

• depends on the sign of the number

• the square root of the complex number

Tags

CCSS.HSN.CN.A.1

Leon is asked to simplify √-120. A good first step would be to...

• divide 120 by 2

• replace the negative with an i on the outside of the radical

• take the square root of -120

• graph y = √-120

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

The complex conjugate can be found by...

• Changing the sign of both a and b

• Changing the sign of a

• Changing the sign of b

• Switching the a and b values

Tags

CCSS.HSN.CN.A.3

CCSS.HSN.CN.B.5

If you are adding two complex numbers you should

• add all the numbers together then divide by 2

• add only the real numbers and subtract the complex numbers

• add only the complex numbers and subtract the real numbers

• add only the real numbers together and then add only the complex numbers together then stop

Tags

CCSS.HSN.CN.A.2

You can simplify powers of i by... (Choose all correct answers)

• dividing the exponent by 4 then use the remainder to determine the value

• multiplying the exponent by 3 and then subtracting 2

• using the clock diagram and counting off the power until you get to the power in the problem

• taking the square root

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

Like terms have ________.

• only the same variable

• the same power but different variables

• the same variable but different powers

• the same variable at the same power

Tags

CCSS.6.EE.A.4

All imaginary numbers are like terms.

• true

• false

Tags

CCSS.HSN.CN.A.1