Exercice 2 :

1)

F = 4x² - 12x + 9

F = 4 * (-4/3)² - 12 * (-4/3) + 9

F = environ 32.1

Exercice 3 :

2)

9 996² - 9998 * 9992

= (10 000 – 4)² - (10 000 – 2)(10 000 – 8)

= 2(10 000)

= 20 000