Quiz #4: 4.2 and 4.3 Alg II

(3 + 2i) + (4 - 5i)

• 7 + 7i

• 1 - 3i

• 1 - 7i

• 7 - 3i

(4 - 2i) - (3 + 6i)

• 7 - 4i

• 1 + 4i

• 1 - 8i

• 7 - 8i

What does i² equal?

• -1

• √-1

• 1

• -√1

What letter represents an imaginary number?

• a

• i

• j

• x

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

• -2+6i
• 12+6i
• -35-16i²
• -35 -16i

(2i)(3i)

• 5i
• -5
• 6i
• -6

(4 - 2i) - (3 + 6i)

• 7 - 4i

• 1 + 4i

• 1 - 8i

• 7 - 8i

• 40 + 32i

• 40 + 18i

• -30 - 18i

• -30 - 32i

Multiply: -4 (13 + 5i)

• -52 − 20i

• 9 + i

• 17 − 20i

• -52 + 20i

When you are solving for the roots/zeros of a quadratic function, which equation should you use?