Find all the zeroes of 2x^(4)-3x^(3)-3x^...

Find all the zeroes of `2x^(4)-3x^(3)-3x^(2)+6x-2`, if you know that two of its zeroes are `sqrt(2)` and `-sqrt(2)`.

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The correct Answer is:

`sqrt(2),-sqrt(2),1 " and " 1/2`.

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