Imaginary Numbers Intro

• i

• -1

• 1

• -i

What is the "imaginary part" of the complex number (-2+7i)?

• 2

• -2

• 7i

• -7i

Simplify

• ± 2i √10

• ± 2 √10

• ± 4i √10

• ± 4 √10

Simplify

• ± 6

• ± 6i

• ± √6i

• ± √6

What letter usually represent imaginary number?

• a

• i

• j

• x

• e

Answer explanation

• 10
• -10
• 10i
• -10i

What is the value of x if x = 10?

• 10

• -10

• 10i

• -10i

Simplify:
(2 - 4i) + (5 + 6i)

• 7 + 2i

• 7 - 2i

• 7 + 2i²

• 7 - 2i²

Simplify:

(4 − 7i) − (-3 + 6i)

• 7 − 13i

• 7 − i

• 1 − 13i

• 1 − i

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

• 1 + 5i

• 7 + 9i

• 1 + 9i

• -1 + 5i