Question Number 143775 by akmalovna05 last updated on 18/Jun/21
$$\mathrm{x}×\mathrm{y}''−\mathrm{y}=\hat {\mathrm{x}3} \\ $$
Answered by TheHoneyCat last updated on 21/Jun/21
$$\mathrm{I}\:\mathrm{a}\:\mathrm{polynomial}\:\mathrm{solution}: \\ $$$${f}:\begin{cases}{\mathbb{R}}&{\rightarrow}&{\mathbb{R}}\\{{x}}&{ }&{−{x}^{\mathrm{3}} +\mathrm{6}{x}^{\mathrm{2}} +\mathrm{12}}\end{cases} \\ $$