Pre-Calculus - Multiplying complex numbers (root(14)+root(10) i) (root(14)-root(10) i)

What is the initial expression that needs to be multiplied in the video?

• sqrt 10 - sqrt 14 I times sqrt 10 + sqrt 14 I

• sqrt 10 + sqrt 14 I times sqrt 10 - sqrt 14 I

• sqrt 14 - sqrt 10 I times sqrt 14 + sqrt 10 I

• sqrt 14 + sqrt 10 I times sqrt 14 - sqrt 10 I

What method is recommended to simplify the multiplication of binomials?

• Guessing the result

• Memorizing the formula

• Drawing a visual diagram

• Using a calculator

What is the result of multiplying sqrt 14 by sqrt 14?

• sqrt 28

• 14

• sqrt 196

• 28

What happens to the terms sqrt 140 I and -sqrt 140 I in the calculation?

• They multiply to sqrt 19600 I

• They remain unchanged

• They cancel each other out

• They add up to sqrt 280 I

What is the final result of the multiplication?

• 24

• 14

• 10

• 0