Complex Numbers_CUBA 3

What is the definition of complex numbers?

• Numbers in the form a + bi where a is a real number and bi is an imaginary number

• Numbers that can only be positive or negative

• Numbers that can only be whole or decimal

• Numbers that can only be square roots of positive numbers

What does the imaginary unit 'i' represent?

• The square root of negative 1

• The square root of 1

• The square root of 0

• The square root of 2

What is the square root of negative 64?

• 8

• 16

• 32

• 8i

What is the result of (3i)^2?

• 3

• 9

• -3

• -9

Which of the following is a complex number?

• 2

• 5i

• -3

• 0.5

What is the result of (-2 + 4i) + (7 - 3i)?

• 5 + i

• 5 - i

• 9 + i

• 9 - i

What is the result of (5 + 2√(-16)) + (2 + 3√(-9))? (Note: √ represents square root)

• 7 + 17i

• 7 - 17i

• 7 + 8i

• 7 - 8i

What is the result of (9 - 6i) - (12 + 2i)?

• -3 - 8i

• -3 + 8i

• 3 - 8i

• 3 + 8i

What is the result of (8 + 7i) * (4 + 5i)?

• -3 + 68i

• -3 - 68i

• 3 + 68i

• 3 - 68i

What is the result of (10 + 4i) / (-4 - 3i)?

• 52 + 14i

• 52 - 14i

• -52 + 14i

• -52 - 14i