Complex Numbers/Quadratics Quiz

Find the sum.

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

• -2+6i

• 12+6i

• -35-16i²

• -35 -16i

Simplify:

(10+ 15i) - (48 - 30i)

• 58 - 45i

• 58 - 15i

• -38 - 15i

• -38 + 45i

(2i)(3i)

• 5i

• -5

• 6i

• -6

(3+8i)(-2-i)

• 2-19i

• 23-i

• 34+5i

• 23-i

What is i?

• 1

• -1

• √-1

• √1

Simplify: i³¹

• i

• -i

• 1

• -1

Simplify: i⁷²

• i

• -i

• 1

• -1

Write in standard form: (5 + 3i)(5 - 3i)

• 34

• 16

• 25 - 30i + i²

• 24 - 30i

√-36

• 6
• -6
• -6i
• 6i

What does i² = ?

• -1
• √-1
• 1
• -√1