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.
solve (x3 – 12x2 + 28x – 9 = 0)
solve (x3 – 12x2 + 28x – 9 = 0)
Natural Language
Math Input
Extended Keyboard
