Question
$$2 = 3x^3-6x^5-x^6$$
Answer
$$ x = -1 $$
Explanation
$$ \begin{aligned} 2 &= 3x^3-6x^5-x^6&& \text{simplify right side} \\[1 em]2 &= -x^6-6x^5+3x^3&& \text{move all terms to the left hand side } \\[1 em]2+x^6+6x^5-3x^3 &= 0&& \text{simplify left side} \\[1 em]x^6+6x^5-3x^3+2 &= 0&& \\[1 em] \end{aligned} $$
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