Réponses

2014-01-17T19:02:18+01:00
Pour x = 2
A = 3 x 2^2 - 2 x 2 + 7
= 3 x 4 - 4 + 7
= 12 + 3
= 15

Pour x = -1
A = 3 x (-1)^2 - 2 x (-1) + 7
= 3 x 1 + 2 + 7
= 3 + 9
= 12