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.
(a - 2 ) * (a + 2.5) - a² - 5=0
(a - 2 ) * (a + 2.5) - a² - 5=0
Natural Language
Math Input
Extended Keyboard