Find all real solutions of the polynomial equation 
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Definitions:
Picketing
The act of standing or marching outside a place of work or another location as a form of protest, often by workers during a strike.
Preferred Shares
Shares giving the shareholder preference over other classes of shares; that preference often pertains to the payment of dividends.
Legal Obligation
A legal obligation is a requirement imposed by law, where a person is required to perform or refrain from performing a certain action.
Dividends
Payments made by a corporation to its shareholders, usually derived from the company's profits.
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