Compatibility with version IOS 9.3.5 and 11.x (Only one installer)

Hello, I have a problem with how can I do for only have one ipa installation for 2 IOS versions.
I don’t know if it’s possible that one .ipa called an other .ipa for install depending the version or configurate the Visual Studio 2017 to work in both.
The iPad 9.3.5 version is 32 bits and 11.x version is 64.
Thanks!