Question

2x³ + 6x² + 2x = -6
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Answer 1

$\displaystyle\bf\\2x^{3} +6x^{2} +2x=-6\\\\2x^{3} +6x^{2} +2x+6=0\\\\2x^{2}\cdot(x +3) +2\cdot(x+3)=0\\\\(x+3)\cdot(2x^{2} +2)=0\\\\(x+3)\cdot(x^{2} +1)=0\\\\\\\left[\begin{array}{ccc}x+3=0\\x^{2} +1=0\end{array}\right\\\\\\\left[\begin{array}{ccc}x=-3\\x^{2} =-1 \ \Rightarrow \ x\in \oslash\end{array}\right\\\\\\Otvet \ : \ -3$