The Number System and Simplifying Complex Numbers

Select all: Natural Numbers

• 4.5

• 5

• -2

• 0

• 7,652

Select all: Integers

• 4.2

• 4

• -4.2

• 4/3

• -2

Select all: Which categories does the number 3.7 belong to?

• Real numbers

• Rational numbers

• Integers

• Whole numbers

• Natural numbers

Select all: Which categories does the number zero belong to?

• Rational number

• Integer

• Whole number

• Natural number

Which of the following is NOT an irrational number?

• 5.58703...

(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

Simplify:
i⁷

• i
• -i
• 1
• -1

i⁶⁶

• 1
• i
• -1
• -i