Tutorial - How do we multiply complex numbers ex 15, (6 - 5i)(1 + 3i)

The video tutorial covers various techniques for multiplying numbers, focusing on non-complex numbers. It introduces the FOIL Face method, a creative way to remember the FOIL technique for multiplying binomials. The instructor provides a detailed example of multiplying complex numbers, demonstrating the process step-by-step and explaining the significance of each step. The tutorial aims to help students understand and remember the multiplication of binomials and complex numbers through engaging methods.

Which of the following methods is NOT mentioned as a technique for multiplying non-complex numbers?

• Special factoring techniques

• Matrix method

• Box method

• FOIL method

What is the unique feature of the 'foil face' method that helps students remember the steps?

• It involves a dance

• It uses a rhyme

• It involves drawing a face

• It uses a song

In the 'foil face' method, what does the 'F' in FOIL stand for?

• Factor

• Final

• First

• Face

When multiplying complex numbers, what does 'i squared' represent?

• Negative one

• Positive one

• Two

• Zero

What is the final result of the example calculation using the 'foil face' method?

• 21 - 13i

• 15 + 18i

• 21 + 13i

• 6 + 5i