Imaginary Numbers
2 years ago
laurenehrlich
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17 QuestionsShow answers
  • Question 1
    120 seconds
    Q. Simplify √-4
    answer choices
    2i
    -2i
    2
    4i
  • Question 2
    120 seconds
    Q. Simplify -√-8
    answer choices
    -i√8
    -2i√2
    2i√2
    -8i
  • Question 3
    60 seconds
    Q. Calculate:
    i + 6i
    answer choices
    6i2
    7i
    5i
    7i2
  • Question 4
    120 seconds
    Q. Calculate:
    (4 − 7i) − (-3 + 6i)
    answer choices
    7 − 13i
    7 − i 
    1 − 13i
    1 − i 
  • Question 5
    120 seconds
    Q. Calculate: 
    (1 − 2i) + (-4 + 2i)
    answer choices
    -3
    -3 − 4i
    5 − 4i
    5
  • Question 6
    60 seconds
    Q. What does i=  ?
    answer choices
    1
    -1
    √-1
    √1
  • Question 7
    120 seconds
    Q. Calculate:
    -4 (13 + 5i) 
    answer choices
    -52 − 20i
    9 + i
    17 − 20i
    -52 + 20i
  • Question 8
    120 seconds
    Q. 6i (-5 + 10i)
    answer choices
    -30i + 60i2
    30i − 16i2
    11i + 60i2
    -11i2+ 16i
  • Question 9
    300 seconds
    Q. Calculate (multiply):
     (4 + 3i)(4 − 3i)
    answer choices
    16 − 9i2
    25
    7
    8 − 6i
  • Question 10
    300 seconds
    Q. Calculate (multiply):
    (1 − 2i)(6 + 5i)
    answer choices
    16 − 7i
    -16 + 7i
    -16 − 7i
    16 + 7i
  • Question 11
    60 seconds
    Q. Find the conjugate of:
    5 + 7i
    answer choices
    5 − 7i
    -5 − 7i
    -5 + 7i
  • Question 12
    60 seconds
    Q. Find the conjugate of:
    -4 − 8i
    answer choices
    -4 + 8i
    4 − 8i
    4 + 8i
  • Question 13
    300 seconds
    Q. Calculate(Divide, multiply by conjugate):
    answer choices
    12/5 − 4/5i
    -8/10i − 4/5 
    -4/5 + 12/5i
    12/5 + 4/5i
  • Question 14
    300 seconds
    Q. Calculate(Divide, multiply by conjugate):
    answer choices
    -3/4 − 1/4i
    3/4 + 1/4i
    -3/4 + 1/4i
    3/4 − 1/4i
  • Question 15
    180 seconds
    Q. Simplify: 
    (10+ 15i)-(48 - 30i)
    answer choices
    58 - 45i
    58 - 15i
    -38 - 15i
    -38 + 45i
  • Question 16
    120 seconds
    Q. i7
    answer choices
    i
    -i
    1
    -1
  • Question 17
    30 seconds
    Q. i13
    answer choices
    -1
    1
    i
    -i
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