Verify that the numbers given alongside of the cubic polynomials below are their zeroes. Also ve...

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Verify that the numbers given alongside of the cubic polynomials below are their zeroes. Also verify the relationship between the zeroes and the coefficients in each case:
(i) \( 2 x^{3}+x^{2}-5 x+2 ; \frac{1}{7}, 1,-2 \)
(ii) \( x^{3}-4 x^{2}+5 x-2 ; 2,1,1 \)
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