Sagot :
A= 15x2 + 3x
A= 3x5x2 + 3xx ( facteur commun est 3)
A= 3(5x2+x)
B=(2x + 1)(x-3) + 4(x-3)
B=(x-3) (2x+1+4)
C=(3x+2)(x+1) -5(3x +2)
C=(3x+2) (x+1-5)
D=(y+2) 2- (y+2)
D= 2- (y+2)
E=(5x + 3)(2x + 1) - (x + 1)(5x + 3)
E=(5x + 3) (2x + 1 - (x+1))
E= (5x + 3) ( 2x + 1 - x + 1)
Il me semble que c’est juste
A= 3x5x2 + 3xx ( facteur commun est 3)
A= 3(5x2+x)
B=(2x + 1)(x-3) + 4(x-3)
B=(x-3) (2x+1+4)
C=(3x+2)(x+1) -5(3x +2)
C=(3x+2) (x+1-5)
D=(y+2) 2- (y+2)
D= 2- (y+2)
E=(5x + 3)(2x + 1) - (x + 1)(5x + 3)
E=(5x + 3) (2x + 1 - (x+1))
E= (5x + 3) ( 2x + 1 - x + 1)
Il me semble que c’est juste
- A = 15×2 + 3x
A = 30 + 3x
- B = (2x + 1)( x - 3) + 4(x - 3)
B = 2x² - 6x + 1x - 3 +4x - 12
B = 2x² - 1x - 15
- C = (3x + 2)(x + 1) - 5(3x + 2)
C = 3x² + 4x + 2x + 2 - 15x -10
C = 3x² - 9x - 8
- D = (y + 2)2 - (y + 2)
D = 2y + 4 - 1y - 2
D = 1y + 2
- E = (5x + 3)(2x + 1) - (x + 1)(5x + 3)
E = 10x² + 5x + 6x + 3 - 5x² - 3x - 5x - 3
E = 5x² + 3x + 0