Look here.
In my last reply, there is a general way of finding roots.
. Solve and graph all solutions.
Hint: Then use the solutions to factor into quadratic factors with real coefficients.
It gave me a hint, but I don't understand this hint.
For me, now I know only . And after that, I am not sure how to make it in
Would you please tell me the direction.
Thank you.
isn't one of the solutions. .
This is what I get:
If , then the nth roots of a complex number would be in the form of
,
where k = 0, 1, 2, ... n - 1.
In our case, n = 4, r = 16, and k will go from 0 to 3. The angle simplifies to
The four fourth roots of are:
Furthermore, I don't think can be factored into quadratic factors with real coefficients. , but that doesn't work.
Are you sure the problem isn't (with a minus sign)?
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