Question

Verify that the numbers given along side of the cubic polynomials below are their zeros. Also, verify the relationship between the zeros and coefficients in each case:

(i) f(x) = 2x³ + x² - 5x + 2; \(\frac{1}{2}\), 1, - 2

(ii) g(x) = x³ - 4x² + 5x - 2; 2, 1, 1

Answer 1

(i)  f(x) = 2x³ + x² - 5x + 2; \(\frac{1}{2}\), 1, - 2

(ii) g(x) = x³ - 4x² + 5x - 2; 2, 1, 1