bonjour
f (x) = 3 ( x - 7 )² - 12
f (x) = 3 ( x² - 14 x + 49) - 12
f (x) = 3 x² - 42 x + 147 - 12
F (x) = 3 x² - 42 x + 135
f ( - 6 ) = 3 *36 - 42 * -6 + 135 = 108 + 252 + 135 = 279
f ( - 5) = 3 *25 - 42*-5 + 135 = 420
f ( - 4 )= 3 *16 - 42*-4 + 135 = 351
f ( - 3 ) = 3 *9 - 42*- 3 + 135 = 288
( - 2 ) = 3 * 4 - 42 *-2 +135 = 231
f ( - 1 ) = 3 * 1 - 42* - 1 + 135 = 180
f ( 0) = - 12
f 1 ) = 3*1 - 42 * 1 + 135 = 96
etc tu continues jusqu'à f ( 6 )
