Complex Numbers and Imaginary

Multiply: 
(4 – 3i)(-7 – 2i)

•   -23 + 13i

•   -23 - 29i

•   -34 + 13i

•   -34 - 29i

Simplify:

(10 + 15i) - (48 - 30i)

• 58 - 45i

• 58 - 15i

• -38 - 15i

• -38 + 45i

Find the sum.

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

• -2 + 6i

• 12 + 6i

• -35 - 16i²

• -35 - 16i

(2i)(3i)

• 5i

• -5

• 6i²

• -6

What letter usually represent imaginary number?

• a

• i

• j

• x

• e

Answer explanation

Q1. What is the value of the expression 10 + -10?

• A) 10

• B) -10

• C) 10i

• D) -10i

What is the value of x if x = 10?

• 10

• -10

• 10i

• -10i

• A
• B
• C
• D

• A
• B
• C
• D

• A
• B
• C
• D