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19 December, 09:59

How to solve this equation 2xsquare-4x-6=0

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Answers (2)
  1. 19 December, 10:12
    0
    (2x2-4) - 6=0

    2x2-4x-6=2 * (x2-2x-3)

    x2-3x+1x-3

    1 * (x-3)

    (x+1) * (x+3).
  2. 19 December, 10:20
    0
    2x^2-4x-6=0

    2 (x^2-2x-3) = 0

    2 (x-3) (x+1) = 0

    2=0 x-3=0 x+1=0

    2 does not = 0 so this is extraneous

    x=3

    x=-1
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