(q + 2 r) (2 A r^2 + 3 q^4 - A^2) = 2 r^3 (3 q^2 + 2 q r + r^2), A (2 q + r) = r (q + 2 r) (3 q + 2 r) for A, q

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.