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20 June, 17:47

What Number must you add to complete the square?

x2+2x=23

+1
Answers (2)
  1. 20 June, 18:25
    0
    X = {3.898979486, - 5.898979486}

    x = {3.9 x - 5.9}
  2. 20 June, 19:05
    0
    You must add the square of half of the linear coefficient. The "b" term in ax^2+bx, in this case 2.

    So you must add (2/2) ^2=1 to both sides of the equation ...
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