Find all the zeros of the polynomial x^4...

Find all the zeros of the polynomial `x^4+x^3-34x^2-4x+120`, if two of its zeroes are 2 and -2

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Find all zeros of the polynomial f(x)=x^(4)+x^(3)-34x^(2)-4x+120, if two of its zeros are 2 and -2.

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