Let p(x) = 2x4 - 3x3 - 5x2 + 9x - 3 and two of its zeros are √3 and -√3. Find the other two zeros.

Two zeroes are √3 and -√3,


Therefore (x -√3)(x - (-√3) = (x - √3)(x + √3) is a factor of p(x).


Let us divide p(x) by (x - √3)(x + √3) = (x2 - 3)



(2x4 - 3x3 - 5x2 + 9x - 3) = (x2 - 3)(2x2 - 3x + 1)


= (x - √3)(x + √3)(2x2 - 2x - x + 1)


= (x - √3)(x + √3)(2x(x - 1) - 1(x - 1))


= (x - √3)(x + √3)(2x - 1)(x - 1)


Hence,


2x - 1 = 0 or x - 1 = 0


or x = 1


Hence, other two zeroes are or 1.


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