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algebra

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how to factor 8x^3+27?

  • algebra - ,

    8x^3+27=0
    8x^3=-27
    x^3=-(27/8)
    x=-3/2
    proof
    8(-3/2)^3=27=0
    8(-27/8)+27=0
    -27+27=0
    0=0

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