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Sagot :

AYUDA

de même on aura

= 3x - 4 - 2x + x² + 7

= x² + 3x - 2x - 4 + 7

= x² + x + 3

VINS

bonjour

3 x - ( 4 + 2 x ) + ( x² + 7 )

= 3 x - 4 - 2 x + x² + 7

= x² + x + 3

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