Réponse :

bonjour

I = ( x + 1 ) ( 2 x + 1 + 2 x + 2 + 3 ) = ( x + 1 ) ( 4 x + 6 )

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

K = ( 7 x - 3 ) ( 7 x - 3 + x + 2 ) = ( 7 x - 3 ) ( 8 x - 1 )

L = ( x - 2 ) ( 2 y + 2 - 2 y - 1 ) = ( x - 2 )

m = ( a - 3  ) ( x + 1 - 2 x - 2 ) = ( a - 3 ) ( - x - 1 )

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

O = ( x - 3 ) ( x + 1 - x + 1 ) = 2 ( x - 3 )

p = ( x - 4 )  ( x - 4 + 3 x + 9 ) = ( x - 4 ) ( 4 x + 5 )

Explications étape par étape :