Private Sub QuadraticRootSample()
    ' Print some samples of the QuadraticRoot function.

    Debug.Print "AX^2 + BX + C = 0"
        
    Randomize

    Dim intCurTry As Integer
    For intCurTry = 1 To 5
        Debug.Print

        Dim A As Double
        Dim B As Double
        Dim C As Double
        A = Rnd - 0.5
        B = Rnd - 0.5
        C = Rnd - 0.5
    
        Debug.Print "A = " & A
        Debug.Print "B = " & B
        Debug.Print "C = " & C

        Dim X1 As Variant
        Dim X2 As Variant
        X1 = QuadraticRoot(A, B, C, 1)
        X2 = QuadraticRoot(A, B, C, 2)
    
        Debug.Print "X1 = " & X1
        Debug.Print "X2 = " & X2
    
        ' Evaluate the quadratic expression for both roots.
        Debug.Print "Eval X1 = " & QuadraticExpr(A, B, C, X1)
        Debug.Print "Eval X2 = " & QuadraticExpr(A, B, C, X2)
    Next intCurTry
End Sub