Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
4.0/sqrt((1 + sqrt(5))/2) - cbrt(31.0)
4.0/sqrt((1 + sqrt(5))/2) - cbrt(31.0)
Natural Language
Math Input
Extended Keyboard
