# SOLUTION: The orignal equation started like this: {{{x^4+18=11x^2}}} Eventually i simplified it to this {{{(x+3)(x-3)(x^2-2)}}} So would my answer just be -3 and 3? What do i do with

Algebra ->  Algebra  -> Quadratic-relations-and-conic-sections -> SOLUTION: The orignal equation started like this: {{{x^4+18=11x^2}}} Eventually i simplified it to this {{{(x+3)(x-3)(x^2-2)}}} So would my answer just be -3 and 3? What do i do with      Log On

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 Click here to see ALL problems on Quadratic-relations-and-conic-sections Question 119941: The orignal equation started like this: Eventually i simplified it to this So would my answer just be -3 and 3? What do i do with the since its unfactorable?Answer by stanbon(57282)   (Show Source): You can put this solution on YOUR website!x^4+18=11x^2 x^4 - 11x^2 + 18 = 0 Factor to get: (x^2-9)(x^2-2)=0 x^2-9 = 0 or x^2-2 = 0 (x-3)(x+3)= 0 or (x-sqrt2)(x+sqrt2)=0 x = 3 or x=-3 or x=sqrt2 or x=-sqrt2 ====================== Cheers, Stan H.