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.
ContourPlot[{a*c - (c - a)^2 == 1, a*c - (a - c)^2 == -1}, {a, 0, 10}, {c, 0, 10}]
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random