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2a squared + 8a = -12

  • math -

    2a^2 + 8a = -12
    a^2 + 4a + 6 = 0
    a = (1/2)*[-4 +/- sqrt(16-24)]
    = (1/2)*[-4 +/- 2i sqrt2]
    where i = sqrt(-1)

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