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24 September, 18:43

What number to add to the equation to complete the square x^2+4x=0

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Answers (2)
  1. 24 September, 18:52
    0
    I believe you're looking for the answer 4. If 4 is added to the equation you get x^2 + 4x+4=0 which reduces to (x+2) ^2
  2. 24 September, 18:53
    0
    4 can be the number you add to complete the square 2*2=4 and 2+2=4 (the 4 on 4x)

    x^2+4x+4
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