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math

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Solve this :
(8x^3 ) - (168x^2) + ( 864x) = 1120

please >>>>>>>>>> I need it >>> please

  • math - ,

    (8x^3 ) - (168x^2) + ( 864x) = 1120 divide by 8
    (x^3 ) - (21x^2) + ( 108x) - 140 = 0

    I tried x = 2 and it worked, so x-2 is a factor
    using synthetic division I founs
    (x-2)(x^2- 19x + 70) = 0

    (x-2)(x-14)(x-5)=0

    so x 2, x = 14, or x = 5

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