exercice 1

Factoriser H(x) = x² - x - 2
aide : calculer H(2)

exercice 2

Factoriser R(x) = x³ + 2x² - 5x - 6
aide :
calculer R(2)
a³ - b³ = (a - b)(a² + ab + b²)

exercice 3

Factoriser A(x) = 2x² + 10x - 3