Imaginary Complex

Find the sum.
(5-2i) + (-7+8i)

• -2+6i

• 12+6i

• -35-16i²

• -35 -16i

Multiply:

(1 − 2i)(6 + 5i)

• 16 − 7i

• -16 + 7i

• -16 − 7i

• 16 + 7i

Multiply: 
(4 – 3i)(-7 – 2i)

•   -23 + 13i

•   -23 - 29i

•   -34 + 13i

•   -34 - 29i

Rationalize the denominator and simplify completely.

What letter usually represent imaginary number?

• a

• i

• j

• x

• e

Answer explanation

Q1. What is the value of the following expression: 10 + 20?

• 10

• -10

• 10i

• -10i

What is the value of x if x = 10?

• 10

• -10

• 10i

• -10i

What is the value of x if x = 10?

• 10

• -10

• 10i

• -10i

i⁷

• i

• -i

• 1

• -1

i¹³

• -1

• 1

• i

• -i