bonjour
A = ( 3/4 - 1/6 ) : 14/15
A = ( 9 /12 - 2 /12 ) : 14/15
A = 7/12 x 15/14
A = 105/168
= 5/ 8
M = 1 - 3 x * 2 - 4 x * 5 x + 6 + 4 x * 3 + 6 x * 3 + 5
M = 1 - 6 x - 20 x² + 6 + 12 x + 18 x + 5
M = - 20 x² + 24 x + 12
si x = 0 M = 12
si x = - 1 , M = - 20 - 24 + 12 = - 32
