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28 July, 15:51

Factor completely: 1331x^3 - 729y^3

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  1. 28 July, 17:29
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    (11x - 9y) (121x² + 99xy + 81)

    Step-by-step explanation:

    Difference of cubes

    ∛1331x³ = 11x = a

    ∛729y³ = 9y = b

    (a³ + b³) = (a + b) (a² - ab + b²)

    (a³ - b³) = (a - b) (a² + ab + b)

    (1331x³ - 729y³) = (11x - 9y) (121x² + 99xy + 81)
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