Sagot :
bonjour
B = (x + 2)(3x + 1) - (x + 2)(2x + 3)
B = ( x + 2 ) ( 3 x + 1 - 2 x - 3 )
B = ( x + 2 ) ( x - 2 )
Réponse:
je pense que cest :
(x+2) (3x+1)-(x+2)1(2x+3)
(x+2(x*3x+x*1+2*3x+2*1)-(x*2x+x*3+2*2x+2*3)
(x+2)(3x² + x + 6x + 2 )- ( 2x²+3x+4x+6)
(x+2)(3x²+7x+2)- ( 2x²+ 7x + 6 )
(x+2)(3x²+7x+2-2x²+7x+6)
(x+2)(x²+14x+8)