SOLUTION: Solve the equation x^4-2⁢x^2-15=0

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Question 344060: Solve the equation x^4-2⁢x^2-15=0
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
x%5E4-2x%5E2-15=0
%28x%5E2%2B3%29%28x%5E2-5%29=0
Two solutions:
x%5E2%2B3=0
x%5E2=-3
highlight%28x=0+%2B-+sqrt%283%29i%29 where i=sqrt%28-1%29
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x%5E2-5=0
x%5E2=5
highlight%28x=0+%2B-+sqrt%285%29%29