SOLUTION: 4x^4-16x^2+15=0, the answer I got was sqrt6/2, sgrt-6/2, sqrt10/2, sqrt-10/2, is that correct?

Question 158768: 4x^4-16x^2+15=0, the answer I got was sqrt6/2, sgrt-6/2, sqrt10/2, sqrt-10/2, is that correct?
Answer by gonzo(654) (Show Source): You can put this solution on YOUR website!
i got and
i also got and
here's how.....

if the whole thing equals 0 then at least one of the factors must = 0.
solving for the first factor = 0, i get
becomes becomes
and
solving for the second factor = 0, i get
becomes becomes
plugging into the original equation, i get

this becomes

this becomes proving first factor is good.
plugging into the original equation, i get

this becomes

this becomes proving second factor is good.
if and are the correct answers (proven above), then
x = +/- and x = +/- are the correct values for x.

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