Imaginary Numbers Are Real (Part 4: Bombelli's Solution)

Is the square root of negative one crucial to the process of finding other solutions? Using the properties of the newly discovered square root of negative one, historical mathematician Bobelli is able to solve Cardan's problem. His method shows the crucial aspect of the need for complex numbers, not only in this particular problem, but also in other mathematical and scientific situations.

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CCSS: Adaptable
Instructional Ideas

  • Show the third and fourth videos in the series together
  • Have your class research other instances where complex numbers are needed in order to solve problems
Classroom Considerations

  • The fourth video in a nine-part series

  • Provides insight into the discovery of the set of complex numbers
  • Fast-paced, well-produced video will keep class engaged

  • None
Common Core