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30 January, 23:56

Find the sum. 2x^2 + 26x + 156=0

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Answers (2)
  1. 31 January, 01:32
    0
    It can not be found it is X e R
  2. 31 January, 01:45
    0
    -13

    Step-by-step explanation:

    2x²+26x+156=0

    x²+13x+78=0

    x²+13x=-78

    x²+13x+169/4=-143/4

    (x+13/2) ²=-143/4

    x+13/2 = (i√143) / 2 or x+13/2 = - (i√143) / 2

    x = (i√143) / 2-13/2 or x = - (i√143) / 2-13/2

    (i√143) / 2-13/2 + ( - (i√143) / 2) - 13/2 = (i√143-13-i√143-13) / 2=-26/2=-13
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