Roots of Complex Numbers

• x=4i and x= -4i

• x=8i and x = -8i

• x= 2.6 and x=-2.6

Simplify.

• -5i

• 5

• 5i

• -5

Simplify the following expression:

• 
• 
• 
• 

Simplify:

3√-81

• -27

• 3i√3

• 27i

• 9i

All imaginary roots comes in pairs.

• True

• False

If a+bi is a root of a polynomial, then _______ is also a root.

• i²

• a-bi

• a+bi

• -i²

Which of the following would be a root with 3i?

• 3i²

• -3i

• 3i

• -3i²

x²+48 = 0

• 4i√3

• ±4√3

• ±4

• ±4i√3

Which is a fourth root of i?

• -1

• -i

• cis 22.5

• cis 45