x

A = (0, 0)
B = Point(xAxis)
u = Vector(A, B)
a: x(B)
texto1: "x=" + (LaTeX[a]) + ""
texto4: "x=" + (LaTeX[a]) + ""
b: sqrt(a)
C: (b, 0)
v = Vector(A, C)
texto2: "\sqrt{" + (LaTeX[a]) + "}=" + (LaTeX[b]) + ""