Alg II Unit 9

Simplify.

• -5i
• 5
• 5i
• -5

Multiply: 
(4 – 3i)(-7 – 2i)

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

Find the sum.
(5-2i) + (-7+8i)

• -2+6i
• 12+6i
• -35-16i²
• -35 -16i

i⁷⁹

• i
• 1
• -1
• -i

(2i)(3i)

• 5i
• -5
• 6i²
• -6

Multiply:
(2-5i)(2+5i)

• 29
• 4 - 25i
• 25 - 10i
• -21

Which quadratic has COMPLEX roots?

• 
• 
• 
• 

What are the zeros of the function f(x) = x² + 64?

• -8 and 8
• -8i and 8i
• (-√8) i and (√8) i
• -√8  and √8

Write (5 + 2yi)(4 − 3i) − (5 − 2yi)(4 − 3i) in a + bi form, where y is a real number.

• 12y + 16yi

• 12y - 16yi

• 12y - 16i

• 12 - 16yi