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bjr je dois faire un exercice en maths le voici
EXERCICE 2
Factoriser et réduire les expressions suivantes:
C = (2x - 1)(x - 5) + (3x + 7)(x - 5) D = (2x + 5)(x - 3) + (2x + 5)(-3x + 1)
E = (3x + 7)(2x - 9) - (3x + 7)(5x - 7)​

Sagot :

Bonjour,

C = (2x - 1)(x - 5) + (3x + 7)(x - 5)

(x-5) ( 2x-1 +3x +7 )

=  (x-5) ( 5x +6)

D = (2x + 5)(x - 3) + (2x + 5)(-3x + 1)

(2x+5) ( x-3 -3x +1)

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

E = (3x + 7)(2x - 9) - (3x + 7)(5x - 7)​

(3x+7) ( 2x-9 -5x +7)

= (3x+7) ( -3x -2)

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