Question 383974
-6x^4+54^2=0
-6x^4+2916=0
-6(x^4-486)=0
(x^4-(81*6)=0
(x^2+9sqrt(6))(x^2-9sqrt(6))=0
x^2=9sqrt(6)
x=3*6^(1/4), x=-3*6^(1/4) the only rel roots.
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Ed