Sagot :
bonjour
( x - 5 )² + 3 ( x - 5 ) = 0
= ( x - 5 ) ( x - 5 + 3 )
= ( x - 5 ) ( x - 2 )
admet 5 et 2
( x + 1 ) ² - 4 x ( x + 1 ) = 0
( x + 1 ) ( x + 1 - 4 x ) = 0
( x + 1 ) ( - 3 x + 1 ) = 0
admet - 1 et 1/3
x² = 32
x = √32 ou - √32 = 4 √2 ou(- 4 √2 )
3) = x2 - 10x + 25 + 3x -15
= x2 - 7x + 10
D = b2 -4ac
= 49+ 40 = 89
reponse c
4) =x2 + 2x + 1 - 4x2 - 4x
= -3x2 -2x + 1
D = 4 + 12
= 16
Reponse b
5) reponse d
= x2 - 7x + 10
D = b2 -4ac
= 49+ 40 = 89
reponse c
4) =x2 + 2x + 1 - 4x2 - 4x
= -3x2 -2x + 1
D = 4 + 12
= 16
Reponse b
5) reponse d