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2015-05-08 19:39:14 +0200 | asked a question | Solving a symbolic inequality I'm trying to solve the inequality $18bcd - 4b^3d + b^2c^2 - 4c^3 - 27d^2 > 0$ with ${b,c,d} \in \mathbb{R}$ and $c < 0$. The goal is to obtain an expression for $d$. My guess would be to use |