20pts a gagner développer et factoriser les expressions suivantes sur feuille: C=(5x-3)²-(5x-3)(2x-5) D=(4x-1)(2x-1)+(4x-1)² E=(6x-3)²-(4x-1)²

Salut,

voici ton exercice corrigé.

C = (5x - 3)² - (5x - 3)(2x - 5)
C = (5x - 3)(5x - 3 - 2x + 5)
C = (5x - 3)(3x + 2)

D = (4x - 1)(2x - 1) + (4x - 1)²
D = (4x - 1)(2x - 1 + 4x - 1)
D = (4x - 1)(6x - 2)

E = (6x - 3)² - (4x - 1)²
E = 12x² - 36x + 9 - 16x² + 8x - 1
E = -4x² - 28x + 8

Si tu as des questions, je reste dispo. A+

C=(5x-3)²-(5x-3)(2x-5)
C = 25x²-30x+9-(10x²-25x-6x+15)
C = 25x²-30x+9-10x²+31x-15
C = 15x²+x-6

C = (5x-3)(5x-3-(2x-5))
C = (5x-3)(5x-3-2x+5)
C = (5x-3)(3x+2)


D=(4x-1)(2x-1)+(4x-1)²
D =(8x²-4x-2x+1)+(16x²-8x+1)
D = 8x²-6x+1+16x²-8x+1
D = 24x²-14x+2

D = (4x-1)(2x-1+4x-1)
D = (4x-1)(6x-2)


E=(6x-3)²-(4x-1)²
E = (36x²-36x+9)-(16x²-8x+1)
E = 36x²-36x+9-16x²+8x-1
E = 20x²-28x+8

E = (6x-3+4x-1)(6x-3-4x+1)
E = (10x-4)(2x-2)