Imaginary Numbers Equations

(i)(5i)

• 15i

• -15i

• -15i³

• 15i³

Simplify √-81

• -√81

• -9i

• 9i

• 81i

Multiply:

(1 − 2i)(6 + 5i)

• 16 − 7i

• -16 + 7i

• -16 − 7i

• 16 + 7i

What is the conjugate of the following... 4+i

• 4 + i

• -4 + i

• -4 - i

• 4 - i

Rationalize the denominator and simplify completely.

Simplify √-4

• 2i

• -2i

• 2

• 4i

Simplify -√-8

• i√8

• 2i√2

• -2i√2

• -8i

Calculate:
(4 − 7i) − (-3 + 6i)

• 7 − 13i

• 7 − i 

• 1 − 13i

• 1 − i 

6i (-5 + 10i)

• -30i + 60i²

• 30i − 16i²

• 11i + 60i²

• -11i²+ 16i

Find the conjugate of:
5 + 7i

• 5 − 7i

• -5 − 7i

• -5 + 7i