SOLUTION: Find all the roots.
x^4 + 11x^2 + 18 = 0
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Question 1020787: Find all the roots.
x^4 + 11x^2 + 18 = 0
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Make the substitution:
By looking at this:
--------------
Plug these results back into substitution
and, also:
-----------------
--------------
The roots are:
, , ,
-----------------------
check answer:
OK
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