SOLUTION: Find all real and complex roots.
x^4-9x^2+20=0
-The solution set is { }.
(Use a comma to separate answers as needed. Type an exact answer, using radicals as needed. Type co
Question 969612: Find all real and complex roots.
x^4-9x^2+20=0
-The solution set is { }.
(Use a comma to separate answers as needed. Type an exact answer, using radicals as needed. Type complex answers in the form a + bi.) Found 2 solutions by Alan3354, Boreal:Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! Find all real and complex roots.
x^4-9x^2+20=0
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Can you do the rest?
You can put this solution on YOUR website! I would factor into
(x^2-5)(X^2-4)=0. It is just like factoring a quadratic, only you end up with quadratic roots.
x^2-5=0 x^2=5 x=plus sqrt(5) and minus sqrt (5)
x^2-4=0
(x+2)(x-2)=0 Difference of squares.
x=2,-2
The four roots are -sqrt (5), -2, 2, and sqrt (5)
