Réponse :
bonjour
A = 2x(x2 - 3x + 5) - x²(x + 6)
A = 2 x ³ - 3 x² + 10 x - x ³ - 6 x²
A = x³ - 9 x² + 10 x
B= (4x - 5)(2x + 3)
B = 8 x² + 12 x - 10 x - 15
B = 8 x² + 2 x - 15
C = 3x (2x - 5) - (2x + 1)(x - 1)
C = 6 x² - 15 x - ( 2 x² - 2 x + x - 1 )
C = 6 x² - 15 x - 2 x² + 2 x - x + 1
C = 4 x² - 14 x + 1
D= 24x2 + 3(4x - 5)(-2x + 3)
D = 24 x² + 3 ( - 8 x² + 12 x + 10 x - 15 )
D = 24 x² - 24 x² + 36 x + 30 x - 45
D = 66 x - 45
Termine , ce sera ta part du devoir
