find all the zeroes of the polynomial 2x^4 -9x^3 + 5x^2 +3x -1 if two of its zeroes are 2 -√3 , -(2+√3).
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Answer:
x^2 + 11x + 30
x^2 + 6x + 5x + 30
x (x + 6) + 5 (x + 6)
(x + 5) (x + 6)
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