Chapter 4B Test

What does i² = ?

• -1
• √-1
• 1
• -√1

Simplify:
(3 + 2i) + (4i + 6)

• 9 + 6i
• 7i + 8
• 9 + 6i²
• 9 - 6i

Simplify:
√-108

• 3i√6
• 3i√20
• 6i√3
• 20i√3

Multiply: 
(4 – 3i)(7 + 2i)

• 22 - 13i

• 28 - 19i

• 34 - 13i

• -34 - 29i

• -20

(3 + 5i)(3 - 5i) = ?

• 34

• -16

• 9 - 5i

• 9 + 5i

Determine the values of a, b, and c for the quadratic equation:

4x² – 8x = 3

• a = 4, b = -8, c = 3

• a = 4, b =-8, c =-3

• a = 4, b = 8, c = 3

• a = 4, b = 8, c = -3

Identify the 'a' value:
 y = 16x² - 8x - 24

• 16
• 8
• -8
• -24