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Sagot :

Bonsoir,

. (X+5)(2X+1)+6(2X+1)

= 2x² +x +10x +5 + 12x +6

= 2x² +23x +11

Bonsoir,

Factoriser :

= (x+5)(2x+1)+6(2x+1)

= (2x+1)(x+5+6)

= (2x+1)(x+11)

Bonne soirée.

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