2.5 Complex Numbers & Roots

√-36

• 6
• -6
• -6i
• 6i

Simplify.

• -5i
• 5
• 5i
• -5

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

CCSS.HSN.CN.B.4

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

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

What is the conjugate of 2 + √3

• 2 + √3

• 2 - √3

• -2 + √3

• -2 - √3

Tags

CCSS.HSN.CN.A.3

Determine the complex conjugate of (-3-12i)

• -3-12i
• 3-12i
• 3+12i
• -3+12i

Tags

CCSS.HSN.CN.A.3

Solve for x: 

• x = {-4, -1}
• x = {-1, -4}
• x = {2+i, 2-i}
• x = {-2+i, -2-i}

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

Solve for x:

• x = {-3+2i, -3-2i}
• x = {7, 6}
• x = 2±i√3
• No solution

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

Solve for x: x² - 5x + 8 = 0

• x = (-5±i√7)/2
• x = (5±i√7)/2
• x = (8±i√7)/2
• x = (5±√57)/2

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

Solve for x: x² - 3x + 10 = 0

• x = -3±i√31
• x = (3±√49)/2
• x = 5, -2
• x = (3±i√31)/2

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7