SharePoint 2010: How to add back QuickLaunch to the web part page.

Actually this is not adding but just removing hiding functionality:

1. Remove this code/css from the page

<SharePoint:UIVersionedContent ID="WebPartPageHideQLStyles" UIVersion="4" runat="server">
<ContentTemplate>
<style type="text/css">
body #s4-leftpanel {
display:none;
}
.s4-ca {
margin-left:0px;
}
</style>
</ContentTemplate>
</SharePoint:UIVersionedContent>


2. Remove this place holder from the page

<asp:Content ContentPlaceHolderId="PlaceHolderLeftNavBar" runat="server"></asp:Content>