bonsoir
A = 4 + 5 / 16 = 9 /16
B = - 4 + 2 * ( - 2 )² / 8 =( - 4 - 8 )/ 8 = - 12/8 = - 3/2
C = - 2 : ( 4/6 - 9/6 ) = - 2 : - 5 /6 = - 2 * - 6/5 = - 12 /5
D = 2 - 1 : ( 5/15 - 3 /15 ) = 2 - 1 : 2/15 = 2 - 1 * 15 /2 = 2 - 15/2 = 4/2 - 15/2 = - 13/2
f( x) = - 2/5 ( x + 1 )²
f (0) = - 2 /5
f ( - 1 ) = 2/5 ( - 1 + 1 )² = 0
tu fais pareil pour - 4/5