Help Quadratic Equation Solver

'Activity module
Sub Process_Globals
   'These global variables will be declared once when the application starts.
   'These variables can be accessed from all modules.
   Dim texta As Int
   Dim textb As Int
   Dim textc As Int
   Dim quadratic As Double
   Dim equation1 As Double
   Dim equation2 As Double
   
   
End Sub

Sub Globals
   'These global variables will be redeclared each time the activity is created.
   'These variables can only be accessed from this module.
   Dim clearbutton As Button
   
   Dim EditTexta As EditText
   Dim EditTextb As EditText
   Dim EditTextc As EditText
   Dim Label1 As Label
   Dim Label2 As Label
   Dim Label3 As Label
   Dim Label4 As Label
   Dim Label5 As Label
   Dim Label6 As Label
   Dim lblroot1 As Label
   Dim lblroot2 As Label
   Dim quitbutton As Button
   Dim solvebutton As Button
End Sub

Sub Activity_Create(FirstTime As Boolean)
   'Do not forget to load the layout file created with the visual designer. For example:
   'Activity.LoadLayout("Layout1")
   Activity.LoadLayout ("main")
   ToastMessageShow ("welcome!",False)

End Sub

Sub Activity_Resume

End Sub

Sub Activity_Pause (UserClosed As Boolean)

End Sub



Sub quitbutton_Click
   Dim quit As Int
   quit = Msgbox2("Do you want to quit?","","YES","","NO",Null)
   If quit = DialogResponse.POSITIVE Then
   ToastMessageShow("Goodbye!",False)
   Activity.finish
   End If
End Sub
Sub clearbutton_Click
   
   EditTexta.Text=""
   EditTextb.Text=""
   EditTextc.Text="" 

   
End Sub
Sub solvebutton_Click
   
   'Dim sum As Int
   
   texta=EditTexta.Text   '6
   textb=EditTextb.Text   '5
   textc=EditTextc.Text   '4
   
   '--ROOT1
   
   equation1= Power(textb,2) - (4 * (texta * textc))      'b2-4ac
   equation1=Sqrt(equation1)
   
   equation1= textb - equation1 
   
   equation2=2 * texta  '2a
   
   quadratic= equation1 / equation2 
   
   lblroot1.Text=quadratic 
   
   
   '--ROOT2
   
   equation1= Power(textb,2) - (4 * (texta * textc))      'b2-4ac
   equation1=Sqrt(equation1)
   
   equation1= -textb + equation1 
   
   equation2= 2 * texta   '2a
   
   quadratic =equation1 / equation2 
   
   lblroot2.Text=quadratic 
   

   
End Sub