Asked by Tom
Find all real and complex roots and type complex answers in the form a+bi.
x^4-9x^2+20=0
x^4-9x^2+20=0
Answers
Answered by
Reiny
x^4-9x^2+20=0
(x^2 - 4)(x^2 - 5) = 0
x^2 = 4 or x^2 = 5
x = ± 2 or x = ± √5
All 4 roots are real, no complex roots
(x^2 - 4)(x^2 - 5) = 0
x^2 = 4 or x^2 = 5
x = ± 2 or x = ± √5
All 4 roots are real, no complex roots
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.