Réponse:
1 )E = (3x+2) (3x+2) -(15x+10-6x2 (carré) -4x)
E= 9x2 +6x+6x +4-15x -10 +6x2 +4
E= 15x2 -3x -2
2) E= (3x+2) [(3x+2) -(5-2x)]
E= (3x+2) ( 5x-3)
3) E= -30 +6-2
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Réponse:
1 )E = (3x+2) (3x+2) -(15x+10-6x2 (carré) -4x)
E= 9x2 +6x+6x +4-15x -10 +6x2 +4
E= 15x2 -3x -2
2) E= (3x+2) [(3x+2) -(5-2x)]
E= (3x+2) ( 5x-3)
3) E= -30 +6-2