Répondre :
-x^2+3x+2=2
-x^2+3x = 0
Delta = 9 -4 (-1) (0)
Delta = 9
x1 = -3 - racine de 9 / 2x (-1)
x1 = -3 -3/-2
x1 = 3
x2= -3+ racine de 9 / 2 (-1)
x2= -3+3/-2
x2= 0
-x^2+3x = 0
Delta = 9 -4 (-1) (0)
Delta = 9
x1 = -3 - racine de 9 / 2x (-1)
x1 = -3 -3/-2
x1 = 3
x2= -3+ racine de 9 / 2 (-1)
x2= -3+3/-2
x2= 0