You are downloading the Polysolver XAP file v18.104.22.168 for Windows Phone. Polysolver is a free and useful Education app: Polysolver is an application to calculate the roots of polynomial equations, maps them graphically, solve the equation for certain values of its ... You can now download the offline XAP file to install & try it.
Download Locations for Polysolver 22.214.171.124 XAP file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline XAP File To Install It Any More.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Polysolver XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.