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Sagot :

1/ (4x+1)X2 + (2x+3)X2
= 8x + 2 + 4x + 6
=12x + 8
2/ a) (4x+1)(2x+3)
b)=8x*2 + 12x + 2x + 3
=8x*2 +14x +3

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