bonjour j'ai besoin d'aide je n'y arrive pas developer et réduire A= (x+8)(2x-5)+7x C= 12x²+9x+(-5x+2)(7x-4) E = (x + 9)(x – 5) + (2x + 3) G= (6x-7)(x-4)-(10x-8

Bonsoir,

A= (x+8)(2x-5)+7x

A = 2x² - 5x + 16x - 40 + 7x

A = 2x² + 18x - 40

C= 12x²+9x+(-5x+2)(7x-4)

C = 12x² + 9x + ( -35x² + 20x + 14x - 8)

C = 12x² + 9x - 35x² + 20x + 14x - 8

C = -23x² + 43x - 8

E = (x + 9)(x – 5) + (2x + 3)

E = x² - 5x + 9x - 45 + 2x + 3

E = x² + 6x - 42

G= (6x-7)(x-4)-(10x-8)

G = 6x² - 24x - 7x + 28 - 10x + 8

G = 6x² - 41x + 36

I = (-4x + 3)(2 – 5x) + 6(x² – x + 7)

I = -8x + 20x² + 6 - 15x + 6x² - 6x + 42

I = 26x² - 29x + 48

K = (5x + 7)(3x – 8) – (-5x – 2) + 10(x² – 4)

K = 15x² - 40x + 21x - 56 + 5x + 2 + 10x² - 40

K = 25x² - 14x - 94

Bonne soirée