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(Factoring a sum or difference of cubes) and (solving a polynomial equation).


  • Math -

    divide by 2
    x^3 +1=0
    now you have a sum of cubes
    x=-1 or x = (1 ± ?-3)/2 or (1 ± i?3)/2

  • Math -

    Factor the given equation into:
    2x³+2 =0
    => 2(x²+1)=0

    and use one of the identities:
    to factor the given equation to linear and quadratic factors.

    Hence solve the resulting linear and quadratic equations.

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