find all zeros p(x)= 6x^4 -5x^3 -11x^2 +10x -2  

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6 x^4-5 x^3-11 x^2+10 x-2 = 0

(3x - 1)(2x^3-4x-x^2+2) = 0

(3x - 1)(x +sqrt(2))(x-sqrt(2))(2x-1) = 0

(2 x-1) (3 x-1) (x^2-2) = 0

So your roots are

x = 1/2, x = 1/3, x = 2^0.5, and x = -2^0.5

 

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