resultant(x^6+(2 a+1)x^4+2b x^3+(a^2+a+1)x^2+(2a+1)b x+a+b^2+1,z-x^3-a x-b-x) - (z^3+(a+2)z-b)^2

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.