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Mathematics

9th -

12thgrade

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Adding and Subtracting Complex Numbers

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Valeda Thornton

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4 questions

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  • 1. Multiple Choice
    2 minutes
    1 pt

    Simplify the expression:
     (1 + 5i) + (1 − 5i)\left(1\ +\ 5i\right)\ +\ \left(1\ -\ 5i\right)  

     2 + 10i2\ +\ 10i  

     2 + 10i22\ +\ 10i^2  

     22  

     −8-8  

  • 2. Multiple Choice
    2 minutes
    1 pt

    Simplify the expression:
     (8 + 9i) + (4 − 6i)\left(8\ +\ 9i\right)\ +\ \left(4\ -\ 6i\right)  

     17 + 3i17\ +\ 3i  

     12 + 3i212\ +\ 3i^2  

     17 −2i17\ -2i  

     12 + 3i12\ +\ 3i  

  • 3. Multiple Choice
    2 minutes
    1 pt

    Simplify the expression:
     (5 + 14i) − (10 + 2i)\left(5\ +\ 14i\right)\ -\ \left(10\ +\ 2i\right)  

     5 −16i5\ -16i  

     −5 + 16i-5\ +\ 16i  

     5 − 12i5\ -\ 12i  

     −5 + 12i-5\ +\ 12i  

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