Réponse :
bonjour
f (x) = 2 ( x - 3 )²
f (x) = 2 ( x² - 6 x + 9 )
f (x) = 2 x² - 12 x + 18
f (0) = 18
f ( 3) = 2 * 9 - 12 *3 + 18 = 18 - 36 + 18 = 0
f ( - 2 ) = 2 *4 - 12 * -2 + 18 = 8 + 24 + 18 = 50
f ( 3/2) = 2 * 9/4 - 12 *3/2 + 18 = 18/4 - 36/2 + 18 = 4.5 - 18 + 18 = 4.5
f (10) = 2 *100 - 12 * 10 + 18 = 200 - 120 + 18 = 98
f ( - 4 ) = 2 *16 - 12 *-4 + 18 = 32 + 48 + 18 = 98
Explications étape par étape
