Sagot :
bonjour
A = 3 x² + 3 x + 2 x + 2 + 9 x² - 6 x + 1
A = 12 x² - x + 3
B = x² + 2 x + 1 - 2 x² + 3
= - x² + 2 x + 4
A = ( x + 1 - 3 ) ( x + 1 + 3 )
= ( x - 2 ) ( x + 4 )
B = ( x + 4 ) ( 3 x - 2 - 3 x )
= ( x + 4 ) ( - 2 )
Salut
A = (3x+2)(x+1)+(3x-1)²
= 3x²+3x+2x+2+(9x²-6x+1)
= 3x²+9x²+3x+2x-6x+2+1
= 12x²-x+3
B = (x+1)²-2x²+3
= x²+2x+1-2x²+3
= -x²+2x+4
A = (x+1)²-9
= (x+1)²-3²
= (x+1+3)(x+1-3)
= (x+4)(x-2)
B = (3x-2)(x+4)-3x(x+4)
= (x+4)(3x-2-3x)
= -2(x+4)