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.
-(1.19595 a b)/(a + 1.10434 b)^2 /. a=0.8, b=0.5
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random