Sagot :
E = 4 (3x + 2) - (3x + 2)²
E = (3x + 2) [4 - (3x + 2)]
E = (3x + 2) (4 - 3x - 2)
E = (3x + 2) (-3x + 2).
E = (3x + 2) [4 - (3x + 2)]
E = (3x + 2) (4 - 3x - 2)
E = (3x + 2) (-3x + 2).