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Sagot :

Bonjour

Factoriser l'expression :

(a + 6)² - (a + 2)²

= a² + 12a + 36 - (a² + 4a + 4)

= a² + 12a + 36 - a² - 4a - 4

= 12a - 4a + 36 - 4

= 8a + 32

= 8 (a + 4)

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