Complex Numbers 6

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Taught by YourMathGal
  • Currently 4.0/5 Stars.
1867 views | 2 ratings
Part of video series
Meets NCTM Standards:
Lesson Description:

Several examples are provided, showing how to divide by complex numbers in standard form by multiplying numerator and denominator by the conjugate of the complex number in the denominator.

More free YouTube videos by Julie Harland are organized at http://yourmathgal.com

Questions answered by this video:
  • How do you divide complex numbers?
  • How do you get rid of imaginary numbers from the denominators of fractions?
  • How can you use the complex conjugate to simplify a complex fraction?
  • How can you divide 3/(5 - 2i)?
  • How can you simplify 5/(3 + i)?
  • How can you get rid of the imaginary part from the denominator of 10/(3 - 4i)?
  • How do you simplify 4i/(5 + i)?
  • How can you simplify (3 + 2i)/(7 + 2i)?
  • Staff Review

    • Currently 4.0/5 Stars.
    This lesson explains one of the more complicated parts of operations with fractions -- dividing complex numbers in which there is an imaginary part in the denominator. To simplify the fraction by removing the imaginary part, you must multiply the numerator and denominator by the complex conjugate of the denominator. This is a great tutorial on what can be a complicated lesson.