Réponse :
bonjour
A = 5 x - x²
A = x ( 5 - x )
B = 7 x - x²
B = x ( 7 - x )
C = 2 ( x + 3 ) + ( x + 3 ) ( x + 5 )
C = ( x + 3 ) ( 2 + x + 5 )
C = ( x + 3 ) ( x + 7 )
D = ( x - 4 )² - ( x + 1 ) ( x - 4 )
D = ( x - 4 ) ( x - 4 - x - 1 )
D = - 5 ( x - 4 )
E = 9 - x²
E = ( 3 - x ) ( 3 + x )
F = ( x + 4 )² - ( 2 x + 3 )²
F = ( x + 4 + 2 x + 3 ) ( x + 4 - 2 x - 3 )
F = ( 3 x + 7 ) ( - x + 1 )
Explications étape par étape :
