bonjour,
soit x y les 2 nombres
x+y = 37
xy = 322
x = -y+37)
(-y+37)y = 322
-y²+37y-322 = 0
calcul discri =
b²-4ac = 37²-4(-1*-322) = 1369-(+1288) = 1369-1288 = 81
Δ = 81
-b-√Δ/2a =( -37-9)/-2 = 23
-b+√Δ/2a = (-37+9)/-2 = 14
S = {23; 14}
x+y = 3,9
xy = 3,68
x = -y+3,9
(-y+3,9)y= 3,68
-y²+3,9-3,68 = 0
calcul discri :
b²-4ac = (3,9)²-4(-1*-3,68) = 15,21-14,75 = 0,49
Δ = 0,49 √Δ = 0,7
-b-√Δ/2a = -3,9-0,7/-2 = -4,6/-2 = 2,3
-b+Δ√/2 = -3,9+0,7/2 = -3,2/-2 = 1,60
S = {2,3; 1,6}