Exploring Complex Numbers and Imaginary Parts

Identify the imaginary number in the expression 5 - 2i.

• -2

• -2i

• 2i

• 5

What is the imaginary part of the complex number 3 + 4i?

• 5

• 4

• 3

• 0

Identify the real part of the complex number -4 + 6i.

• 4

• -6i

• -4

• 6

Plot the complex number 2 + 5i on an Argand diagram.

• The point (0, 7) on the Argand diagram.

• The point (5, 2) on the Argand diagram.

• The point (2, 5) on the Argand diagram.

• The point (2, -5) on the Argand diagram.

Add the complex numbers (3 + 2i) and (1 - 4i). What is the result?

• 5 - 2i

• 4 - 2i

• 3 - 2i

• 2 + 6i

Multiply the complex numbers (2 + 3i) and (1 + 2i). What is the product?

• -1 + 5i

• 2 - 5i

• 3 + 6i

• -4 + 7i

Find the conjugate of -2 - 5i

• -2 - 5i

• -2 + 5i

• -5 - 2i

• 2 + 5i

Find the conjugate of -1 + 2i?

• 2 - i

• 1 - 2i

• -1 - 2i

• -1 + 3i

(5 + 6i) - (2 + 3i). What is the result?

• 5 + 9i

• 7 + 9i

• 3 + 3i

• 6 + 8i

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

• 6 - i

• 11 + 10i

• 6 - 5i

• 10 + 7i