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If x2 + 4 = 0, then x ?

If x2 + 4 = 0, then x ?

  • A.
    4
  • B.
    -4
  • C.
    2
  • D.
    -2
  • E.
    None of the above
Correct Answer: Option E
Explanation

x2 + 4 = 0
x2 = -4
You can’t apply a square root to a negative number. So the answer is None of the above.