Verified answer

• (x + 2)(x + 1) + (x + 2)(7x - 5)

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

(x+2)(8x-4)

• (x + 3) (3 - 2x) - (x + 3)(5 +x)

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

(x+3)(-2-3x)

• (x - 6)(2 - x) - (2 - x)(3 - 4x)

(2-x)(x-6-3+4x)

(2-x)(5x-9)

DE RIEN

Verified answer

Réponse :

bonjour,

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

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

= ( x+ 2 ) ( 8x - 4 )

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

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

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

= ( x + 3 ) (  - 3x - 2 )

(x - 6)(2 - x) - (2 - x)(3 - 4x)

=( 2 - x ) ( x - 6 -(3 - 4x ) )

=(2 - x ) ( x - 6 - 3 + 4x )

= ( 2 - x) ( 5x -9 )

voila :)