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.
y^2 = 4+x^2 − 2x & (2√7 − y)^2 = 16+x^2−4x
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random