bonjour
f (x) = ( x - 1 )²
f ( 2) = ( 2 - 1 )² = 1 ² = 1
f ( 1 ) = 0
f ( 0) = ( - 1 )² = 1
f ( 3 = ( 3 -1 )² = 2 ² = 4
fraction, tu fais
g (x) = 3 x + 7
3 x + 7 = 5
3 x = 5 - 7
3 x = - 2
x = - 3/2
diviseurs de 28
1 ; 2 ; 4 ; 7 ; 14
1 + 2 + 4 + 7 + 14 = 28
