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Type: Multiple-Choice
Category: Complex Numbers
Level: Grade 11
Standards: HSN-CN.A.1
Author: jjstanley
Last Modified: 7 years ago

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Grade 11 Complex Numbers CCSS: HSN-CN.A.1

What is -81?
  1. 81+i
  2. 81i
  3. 9i
  4. -9i