Multiplying Pure Imaginary Numbers

Simplify the following expression:

-4i(9+7i)

• 28-36i

• -36i-28i²

• -36i-28

• -13i+28i

Simplify the following expression:

-12i(-2-4i)

• 24i-48

• -48-24i

• 24-48i

• -48+24i

• 30

• 30i

• -30

• -30i

• √2

• i√2

• i²√2

• -√2

• 15i

• 9 + 6i

• -3i

• -9 + 6i

Simplify

• A

• B

• C

• D

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

• -60i

• 60

• -60

• 60i

• -12i

• 12i

• -12

• 12

6i (-5 + 10i)

• -30i + 60i²

• 30i − 16i²

• 11i + 60i²

• -11i²+ 16i

6i²

• 6

• -6

• 6i

• 6i²