Imaginary Numbers and Plane

Multiply: 
(4 – 3i)(-7 – 2i)

•   -23 + 13i

•   -23 - 29i

•   -34 + 13i

•   -34 - 29i

Simplify

• ± 4i √2

• ± 4 √2

• ± 2i √8

• ± 2 √8

Simplify.

• -5i

• 5

• 5i

• -5

i⁷⁹

• i

• 1

• -1

• -i

What letter usually represent imaginary number?

• a

• i

• j

• x

• e

Answer explanation

What does i² =  ?

• 1

• -1

• √-1

• √1

Simplify

• ± 6

• ± 6i

• ± √6i

• ± √6

Simplify

• ± 10i

• ± 10

• ± √10i

• ± √10

Simplify:
(2 - 3i)(5 + 4i)

• 22 - 7i

• 22 + 7i

• 22 - 7i²

• 22 + 7i²

• 2i√6

• 8i√3

• -2√6

• -2i√6