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Janet Roberts
Mathematics
3 July, 17:20
What is the a3+b3 equal to? verify by an activity
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Brynn Riddle
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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