Complex Numbers Quiz

Which of the following complex numbers is in rectangular form? Select all that apply.

• 5 + 3i

• 8 cis 44

• 10 cis 72

• -3 + 2i

Which of the following complex numbers is in polar form? Select all that apply.

• 5 + 3i

• 8 cis 44

• 10 cis 72

• -3 + 2i

True or False: It is impossible to add complex numbers in polar form unless you convert them to rectangular form first.

• True

• False

If you are adding complex numbers, which form should they be in?

• Rectangular

• Polar

• Either One is Fine

If you are subtracting complex numbers, which form should they be in?

• Rectangular

• Polar

• Either One is Fine

If you are multiplying complex numbers, which form should they be in?

• Rectangular

• Polar

• Either One is Fine

If you are dividing complex numbers, which form should they be in?

• Rectangular

• Polar

• Either One is Fine

Simplify: (5 + 2i) + (-3 + 7i)

• 8 - 5i

• 2 - 5i

• 2 + 9i

• 8 + 9i

Simplify: (8 - 5i) - (4 + 3i)

• 12 - 2i

• 4 - 8i

• 4 - 2i

• 12 - 8i

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

• 8 - 15i

• 23 - 14i

• 8 - 14i

• 6 - 2i