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16 December, 22:47

Factorize : a2 + b2 _ 2 (ab - ac + bc).

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  1. 17 December, 00:09
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    (a² + b² - 2ab) + 2ac - 2bc = (a - b) ² + 2c (a-b) = (a-b) (a-b + 2c)
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