Operations of Imaginary Numbers

Simplify -√-8

• -i√8

• -2i√2

• 2i√2

• -8i

Multiply:

(4 – 3i)(–7 – 2i)

FYI - your calculator can do this one :)

• –23 + 13i

• –23 – 29i

• –34 + 13i

• –34 – 29i

Using your calculator, evaluate i⁷

• -1

• 1

• i

• -i

Using your calculator, evaluate i²

• -1

• 1

• i

• -i

What is the simplified form of (–9 + 5i) + (3 – 2i)

• –12 + 31i

• –6 + 3i

• –11 + 7i

• 5 – 3i

What is the simplified form of (–3x + 2i)(x– 4i)

• –3x² + 6xi – 8

• –3x² + 6xi + 8

• –3x² + 14xi – 8

• –3x² + 14xi + 8

(5x – 2i) + (–7x + 8i)

• –2x + 6i

• 12x + 6i

• –35x – 16i²

• –35 – 16i

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

• 14+8i

• 48+16i

• 12-8i

• 2-8i

What is the "real part" of the complex number (-2+7i)?

• 2

• -2

• 7i

• -7i

What is the "imaginary part" of the complex number (-2+7i)?

• 2

• -2

• 7i

• -7i