SummerJade SummerJade
  • 31-01-2016
  • Mathematics
contestada

Find all real and imaginary zeros of 64x^3+216=0

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Panoyin
Panoyin Panoyin
  • 31-01-2016
     64x³ + 216 = 0
8(8x³) + 8(27) = 0
    8(8x³ + 27) = 0
             8          8
        8x³ + 27 = 0
               - 27 - 27
                8x³ = -27
                 8        8
                  x³ = -3³/₈
                   x = -1¹/₂
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