Complex Numbers

Simplify
3i - (4 + 7i)

• -4 + 10i

• 21 - 12i

• 4 - 10i

• -4 - 4i

Multiply: 
(4 – 3i)(7 + 2i)

•  22 - 13i

•  28 - 19i

•  34 - 13i

•   -34 - 29i

Simplify: 
(7 + 2i)(9 - 6i)

• 75-24i

• 63 - 24i  - 12i²

• 51 - 24i

• 58 + 60i

Refer to the above image, what is the conjugate of the denominator?

• 8 + 6i

• 6 + 8i

• 6 - 8i

• -6 +8i

Simplify 
√-25

• -5i

• 5

• 5i

• -5

√-108

• 3i√6

• 3i√20

• 6i√3

• 20i√3

Simplify
2i - 7i + 10

• -5i+10

• 5i

• 9i+10

• 5i+10

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

• -2+6i

• 12+6i

• -35-16i²

• -35 -16i

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

• -6+12i

• -12-6i

• -2+7i

• 12+6i

What is the simplified form of (8 -3i)²?

• 73

• 16 - 6i

• 55 + 48i

• 55 - 48i