Number and algebraCourse skill

Multiplying complex numbers

Expand the brackets, then replace squared by −1.

  • Make all four products.
  • Replace every squared by −1, then collect the real and imaginary parts.

Example 1

Expand and use

Simplify the expression.

Example 2

Fully simplify the expression.

Your turn

5 practice questions
Question 1

Simplify.

Check answer
Question 2

Simplify.

Check answer
Question 3

Simplify.

Check answer
Question 4

Simplify.

Check answer
Question 5

Simplify.

Check answer
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