Hey guys I really need help. You don't have to give the answer I just really need an explanation as to how to find the roots with work, thank you so much.
Find the roots of f(n)=n^2-2n-15.
Tip: The ^2 means "to the power of" so n^2 is n to the power of 2.
Please help! Keep it simple, but let it make sense.

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