3.3 Complex Numbers

3.3 Complex Numbers

Sunday, November 15 / 2020

Multiple Choice

Simplify.

• -5i
• 5
• 5i
• -5

Multiple Choice

(2i)(3i)

• 5i

• -5

• 6i

• -6

Multiple Choice

√-4

• -2

• -2i

• 2

• 2i

Open Ended

 $Solve\ x^2\ +\ 16$  

Open Ended

 $Solve\ 4x^2\ +\ 100$  

Open Ended

Find the value of x and y that make

4x -3 + (y + 2) i = 8 + 9i

Open Ended

Find the value of x and y that make

-3x + 6 + (y - 5i) i = 10 + 3i

Multiple Choice

Simplify:
(4 + 7i) - (3 + 2i)

• 1 + 5i
• 7 + 9i
• 1 + 9i
• -1 + 5i

Multiple Choice

(5-2i) + (-7+8i)

• -2+6i
• 12+6i
• -35-16i²
• -35 -16i

Multiple Choice

Multiply: 
(4 – 3i)(-7 – 2i)

• A.  -23 + 13i
• B.  -23 - 29i
• C.  -34 + 13i
• D.  -34 - 29i

Multiple Choice

Divide

• A

• B

• C

• D

Multiple Choice

What is the complex conjugate of  4-3i?

• A.  1/(4-3i)
• B. 1/(4+3i)
• C.  -4 + 3i
• D.  4 + 3i