A(0,c)

B(2α,c)

α=-b/2a

x=α

S(α;β)

β=P(α)

Sommet

Axe de symétrie

P(x) = x^(2) - 4 * x + 5
A = Intersect(P, yAxis, 1)
B = Point(P)
C = (2, 5)
D = Point(xAxis)
a = Line(C, D)
S = Intersect(P, a, 1)
E = Point(yAxis)
b = Segment(E, S)
F = Point(a)
c = Segment(A, F)
d = Segment(F, B)
M = Point(P)
N = Point(P)
G = (2, 3.43)
e = Segment(M, G)
f = Segment(G, N)