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Sagot :

Bonjour,

7x ( x² + 2x+ 3)

(xy) ( x - y +2xy)

(3y-4) ( x+4)

(3x+4) ( 5x-2 + 3x+4)

=(3x+4) ( 8x +7)

(2x-3) ( x+1 +5)

= (2x-3)(x+6)

(x+1) ( x+1 +3 +1)

= (x+1) ( x+ 5)

x( -3 +4x +7x²)

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