Complex Numbers

Select all that apply.

• 10

• -10

• 10i

• -10i

What is the complex conjugate of  4-3i?

• A.  1/(4-3i)
• B. 1/(4+3i)
• C.  -4 + 3i
• D.  4 + 3i

Simplify:
i⁷

• i
• -i
• 1
• -1

Simplify:
√-108

• 3i√6
• 3i√20
• 6i√3
• 20i√3

(5-2i) + (-7+8i)

• -2+6i
• 12+6i
• -35-16i²
• -35 -16i

(3i)(-2+4i)

• -6+12i
• -12-6i
• -2+7i
• 12+6i

Multiply: 
(4 – 3i)(-7 – 2i)

• A.  -23 + 13i
• B.  -23 - 29i
• C.  -34 + 13i
• D.  -34 - 29i

Simplify
(-6 - 2i)²

• 32
• 36-4i
• 36+24i
• 32+24i

• A.
• B.
• C.
• D.

What does i² = ?

• -1
• √-1
• 1
• -√1