diff --git a/MyExpression.Wpf/FunctionGraph.cs b/MyExpression.Wpf/FunctionGraph.cs
index d652964..4e864d9 100644
--- a/MyExpression.Wpf/FunctionGraph.cs
+++ b/MyExpression.Wpf/FunctionGraph.cs
@@ -28,19 +28,30 @@ public class FunctionGraph : Canvas, IEnumerable<FunctionGraph.DrawableFunction>
 
 		public Point Scale { get; set; }
 
-		private IList<DrawableFunction> Functions { get; set; } = new List<DrawableFunction>(1);
+		public IList<DrawableFunction> Functions { get; set; } = new List<DrawableFunction>(1);
 
 		public class DrawableFunction
 		{
-			public Func<double, double> Function { get; set; }
-			public SolidColorBrush Brush { get; set; } = Brushes.DarkMagenta;
-			public Interval DefinitionArea { get; set; }
+			public Func<double, double> Function { get; private set; }
+
+			public SolidColorBrush LineBrush { get; private set; } = Brushes.DarkMagenta;
+
+			public Interval DefinitionArea { get; private set; }
+
+			// TODO: разобраться с сеттером
 			public bool IsDrawed { get; set; }
-			public DrawableFunction(Func<double, double> f, Interval defarea, SolidColorBrush brush = null)
+
+			public SolidColorBrush RootsBrush { get; private set; } = Brushes.Indigo;
+
+			public IList<double> Roots { get; set; }
+
+			public DrawableFunction(Func<double, double> f, Interval defarea, SolidColorBrush brush = null, SolidColorBrush rootbrush = null, IList<double> roots = null)
 			{
 				Function = f;
 				DefinitionArea = new Interval(defarea.Left, defarea.Right);
-				if (brush != null) Brush = brush;
+				if (brush != null) LineBrush = brush;
+				if (rootbrush != null) RootsBrush = rootbrush;
+				if (roots != null) Roots = new List<double>(roots);
 			}
 		}
 
@@ -96,7 +107,7 @@ public void DrawFunction()
 				f.IsDrawed = true;
 				var l = new Polyline
 				{
-					Stroke = f.Brush,
+					Stroke = f.LineBrush,
 					StrokeThickness = 1
 				};
 				for (var i = f.DefinitionArea.Left; i <= f.DefinitionArea.Right; i += Step)
@@ -113,7 +124,7 @@ public void DrawFunction()
 							Children.Add(l);
 							l = new Polyline
 							{
-								Stroke = f.Brush,
+								Stroke = f.LineBrush,
 								StrokeThickness = 1
 							};
 						}
@@ -127,6 +138,29 @@ public void DrawFunction()
 			}
 		}
 
+		public void DrawRoots()
+		{
+			foreach (var f in Functions)
+			{
+				if (f.Roots is null) continue;
+				foreach (var i in f.Roots)
+				{
+					var wh = 5;
+					var p = new Ellipse
+					{
+						Width = wh,
+						Height = wh,
+						Fill = f.RootsBrush,
+						Stroke = Brushes.IndianRed,
+						StrokeThickness = 0.5
+					};
+					SetLeft(p, i * Scale.X - wh / 2.0);
+					SetTop(p, f.Function(i) * Scale.Y - wh / 2.0);
+					Children.Add(p);
+				}
+			}
+		}
+
 		public Point CellsStep { get; set; }
 
 		public Interval CellsIntervalX { get; set; }
@@ -197,10 +231,12 @@ public void ClearAll()
 		public void Clear()
 		{
 			Functions.Clear();
-			for (var i = 0; i < Children.Count; i++)
-			{
-				if (Children[i] is Polyline) Children.RemoveAt(i);
-			}
+			Children.Clear();
+			DrawAxis();
+			//for (var i = 0; i < Children.Count; i++)
+			//{
+			//	if (Children[i] is Polyline) Children.RemoveAt(i);
+			//}
 		}
 
 		public IEnumerator<DrawableFunction> GetEnumerator() => Functions.GetEnumerator();
diff --git a/MyExpression.Wpf/MainWindow.xaml b/MyExpression.Wpf/MainWindow.xaml
index ae2e20b..f1b5fdb 100644
--- a/MyExpression.Wpf/MainWindow.xaml
+++ b/MyExpression.Wpf/MainWindow.xaml
@@ -49,6 +49,7 @@
 		<Button x:Name="ClearButton" Content="Clear" HorizontalAlignment="Left" Margin="180,232,0,0" VerticalAlignment="Top" Width="60" Click="ClearButton_Click"/>
 		<Label Content="Count" HorizontalAlignment="Left" Margin="66,33,0,0" VerticalAlignment="Top" Height="28" Width="49"/>
 		<Label x:Name="CountLabel" Content="0" HorizontalAlignment="Left" Margin="115,33,0,0" VerticalAlignment="Top" Width="45"/>
-		<local:BrushesList x:Name="GraphBrushComboBox" Margin="115,335,0,0" Height="30" VerticalAlignment="Top" HorizontalAlignment="Left" Width="125"/>
+		<local:BrushesList x:Name="GraphBrushComboBox" Margin="10,335,0,0" Height="30" VerticalAlignment="Top" HorizontalAlignment="Left" Width="150"/>
+		<Button x:Name="SolveButton" Content="Solve" HorizontalAlignment="Left" Margin="165,335,0,0" VerticalAlignment="Top" Width="75" Click="SolveButton_Click"/>
 	</Grid>
 </Window>
diff --git a/MyExpression.Wpf/MainWindow.xaml.cs b/MyExpression.Wpf/MainWindow.xaml.cs
index a879ca3..c7de7f6 100644
--- a/MyExpression.Wpf/MainWindow.xaml.cs
+++ b/MyExpression.Wpf/MainWindow.xaml.cs
@@ -102,5 +102,21 @@ private void ClearButton_Click(object sender, RoutedEventArgs e)
 				MessageBox.Show(ex.StackTrace, ex.Message);
 			}
 		}
+
+		private void SolveButton_Click(object sender, RoutedEventArgs e)
+		{
+			try
+			{
+				var p = Core.Polynomial.Parse(Polynomial.Text);
+				var pe = new PolynomialEquation(p);
+				pe.Solve();
+				Graph.Functions.Last().Roots = new List<double>(pe.Roots);
+				Graph.DrawRoots();
+			}
+			catch (Exception ex)
+			{
+				MessageBox.Show(ex.StackTrace, ex.Message);
+			}
+		}
 	}
 }