Question 85629
15x^4 - 13x^2 + 2 = 0
(15x^4 -10x^2 -3x^2 +2) = 0
5x^2(3x^2-2) -(3x^2-2) = 0
(3x^2-2)(5x^2-1) = 0
x^2 = 2/3 or x^2=1/5
x=+-(sqrt6)/3 or x=+-(sqrt5)/5
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Cheers,
Stan H.