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INSTRUCTORSCarleen EatonGrant Fraser
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For more information, please see full course syllabus of Algebra 2
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Lecture Comments (2)

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Post by Victor Castillo on January 26, 2013

Never mind I got it.

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Post by Victor Castillo on January 26, 2013

why not leave 98 as 98?

Imaginary and Complex Numbers

  • Imaginary numbers are the square roots of negative numbers.

  • All the properties of square roots extend to radicands containing complex numbers.

  • The complex numbers satisfy the commutative and associative properties for addition and multiplication.

  • To divide one complex number by another one, write the division as a fraction. Then multiply numerator and denominator of this fraction by the complex conjugate of the denominator.

Imaginary and Complex Numbers

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

  • Intro 0:00
  • Properties of Square Roots 0:17
    • Example: Product and Quotient Rules
  • Imaginary Numbers 4:04
    • Powers of Imaginary Numbers
    • Example
  • Complex Numbers 7:21
    • Real and Complex Numbers
  • Equality 9:04
    • Example
  • Addition and Subtraction 9:43
    • Example
  • Complex Plane 11:38
    • Example
  • Multiplication 13:34
    • Example
  • Division 16:36
    • Complex Conjugates
    • Example
  • Lecture Example 1 23:40
  • Lecture Example 2 26:34
  • Additional Example 3
  • Additional Example 4