The associated polynomial equation is formed by setting the polynomial equal to zero: In factored form, this is: \displaystyle {x}=- {2} x= −2. In this example, all 3 roots of our polynomial equation of degree 3 are real. \displaystyle {x}= {3} x = 3 is a root. is a root. \displaystyle {x}=- {2} x = −2 is a root.

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