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← Exact and Complete New Answer - College Algebra

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Showing Revision 2 created 05/25/2016 by Udacity Robot.

  1. Just like we knew that x squared equals 3 had the solutions plus or minus the
  2. square root of 3, here x is equal to plus or minus the square root of negative
  3. 1. However, we know that the square root of negative 1 has a different name.
  4. It's just i, the number we've been talking about. So either positive i, or
  5. negative i can multiply by itself to equal negative 1. However, we said that the
  6. positive version of the square root of negative 1 is equal to I. And logically
  7. then, the negative version is equal to negative I.