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Sagot :

Réponse:

distribuer

10x² + 7x - 12 + ( 5x - 4 )²

utiliser ( a - b)² = a² - 2ab + b²

10x² + 7x - 12 + 25x² - 40x + 16

35x² - 33x - 12 + 16

35x² - 33x + 4

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