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21 July, 14:25

How do you factor x³+8? I know how to factor normally, but not this.

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  1. 21 July, 15:54
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    You can rewrite it as ...

    x³ + 2³

    The sum of cubes formula is a³+b³ = (a + b) (a^2 - ab + b^2)

    = (x + 2) (x^2 - 2x + 2^2)

    = (x + 2) (x^2 - 2x + 4)
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