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Sagot :

Réponse:

A = (8 X+6) (X + 8)

= 8x² + 64x +6x +48

= 8x² + 70x + 48

B = (- 6 X + 9) (10 X - 5)

= -60x² + 30x + 90x - 45

= -60x² + 120x - 45

C = (10 X - 6) (10 x – 10)

= 100x² - 100x - 60x + 60

= 100x² - 160x + 60

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