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pouvais vous m aider developper reduire factoriser (3x+2)au carrée -(3x+2)(x+7)

Sagot :

DROOPETTE
(3x+2)² -(3x+2)(x+7)
=(3x+2)(3x+2) -(3x+2)(x+7)
=(3x+2)(3x+2-x-7)
=(3x+2)(2x-5)
CGAVALON
(3x+2)²-(3x+2)(x+7)
(3x+2)(3x+2)-(3x+2)(x+7)                            
(3x+2)[(3x+2)-(x+7)]
(3x+2)[3x+2-x-7]
(3x+2)(2x-5)