Bonjour qui pourrait m'aider s'il vous plaît? Merci d 'avance :) Exercice 2) Développer , réduire et ordonner les expressions A) (x) = 2x (x - 3) -5 (x - 1) (x

bonjour

A) (x) = 2x (x - 3) -5 (x - 1) (x + 2)
2x²-6x-5(x²+2x-x-2)
2x²-6x -5(x²+x-2)
2x²-6x-5x²-5x+10
-3x²-11x+10

B) (x) = - x (x + 2) - 3 x² - 2x² - 6
-x²-2x-5x²-6
-6x²-2x-6

C) (x) = ( x + 3) ( -2x + 1) - 3x ( x - 2)
-2x²+x-6x+3-3x²+6x
-5x²+x+3

Bonjour,

A) (x) = 2x (x - 3) -5 (x - 1) (x + 2) 
(x) = 2x² - 6x - 5 (x² + 2x - x - 2)
(x) = 2x² - 6x - 5x² - 10x + 5x + 10
(x) = 2x² - 5x² - 6x - 10x + 5x + 10
(x) = - 3x² - 11x + 10

B) (x) = - x (x + 2) - 3 x² - 2x² - 6 
(x) = - x² - 2x - 3x² - 2x² - 6
(x) = - x² - 3x² - 2x² - 2x - 6
(x) = - 6x² - 2x - 6

C) (x) = ( x + 3) ( -2x + 1) - 3x ( x - 2)
(x) = - 2x² + x - 6x + 3 - 3x² + 6x
(x) = - 2x² - 3x² + x + 6x - 6x + 3
(x) = - 5x² + x + 3