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Sagot :

MAUDVI

Réponse:

1) FE = 4 + x

2) AF = 7 - x

3) (x + 4) × 7 - x²

= 7(x + 4) - x²

= 7x + 28 - x²

= -x² + 7x + 28

voilà (✿^‿^)

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