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3 July, 17:20

What is the a3+b3 equal to? verify by an activity

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  1. 3 July, 17:27
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    a³ + b³ = (a + b) (a² - a b + b³)

    For example:

    a = 1, b = 2

    a³ + b³ = 1³ + 2³ = 1 + 8 = 9

    (a + b) (a² - a b + b²) = (1 + 2) (1² - 1 * 2 + 2²) =

    = 3 * 3 = 3

    The formula is true.
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