bonjour, il faut factoriser en détaillant les étapes merci C = - (5x + 10) - ( -9x + 10) ( 5x + 10) E = ( 9x - 10) ( 10x - 10) + 100x² - 100 F= ( -5x + 7)² - (

Bonjour

C = - (5x + 10) - ( -9x + 10) ( 5x + 10)

(5x+10)(-1+9x-10)

(5x+10)(9x-11)

5(x+2)(9x-11)

E = ( 9x - 10) ( 10x - 10) + 100x² - 100

(9x-10)(10x-10) + (10x+10)(10x-10)

(10x-10)(9x-10+10x+10)

(10x-10)(19x)

19x(10x-10)

190x(x-1)

F= ( -5x + 7)² - ( -5x + 7 ) ( 5x + 4)

(-5x+7)(-5x+7 -5x-4)

(-5x+7)(-10x+3)

Bonjour

factoriser en détaillant les étapes  

C = - (5x + 10) - ( -9x + 10) ( 5x + 10)

C = (5x + 10) * -1 - (-9x + 10)(5x + 10)

C = (5x + 10)(-1 + 9x - 10)

C = (5x + 10)(9x - 11)

C = 5(x + 2)(9x - 11)

E = ( 9x - 10) ( 10x - 10) + 100x² - 100

E = (9x - 10) * 10(x - 1) + (10x)² - 10²

E = 10(9x - 10)(x - 1) + (10x - 10)(10x + 10)

E = 10(9x - 10)(x - 1) + 10(x - 1) * 10(x + 1)

E = 10(x - 1)[9x - 10 + 10(x + 1)]

E = 10(x - 1)(9x - 10 + 10x + 10)

E = 10(x - 1)(19x)

E = 190x(x - 1)

F= ( -5x + 7)² - ( -5x + 7 ) ( 5x + 4)

F = (-5x + 7)(-5x + 7 - 5x - 4)

F = (-5x + 7)(-10x + 3)