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Can someone please help me with this question?

 

Find all roots of the polynomial f(t)=t^4-5t^3+5t^2+17t-42.

 

Thank you so much!

 Feb 26, 2021
 #1
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${\left({t}^{{2}}-{4}{t}+{7}\right)}\cdot{\left({t}+{2}\right)}\cdot{\left({t}-{3}\right)}$

 Feb 26, 2021

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