bonjour
f (x) = x² + 2 x - 3
f ( - 5 ) = (- 5 )² + 2 *- 5 - 3 = 25 - 10 - 3 = 12
f ( - 4 ) = ( - 4 )² + 2 * -4 - 3 = 16 - 8 - 3 = 5
f ( - 3 ) = ( - 3 )² + 2 *-3 - 3 = 9 - 6 - 3 = 0
f ( - 2 ) = ( - 2 )² + 2 *-2-3 = 4 - 4 - 3 = - 3
f ( -1) = ( - 1 )² + 2 *-1 - 3 = 1 - 2 - 3 = - 4
f (0) = - 3
f ( 1) = 1 ² + 2 *1 - 3 = 1 + 2 - 3 = 0
f (2) = 2 ² + 2 *2 - 3 = 4 + 4 - 3 = 5
f ( 3) = 3 ² + 2 *3 - 3 = 9 + 6 - 3 = 12
