Q30. Form a polynomial f(x) with real coefficients of degree 3 and the zeros 1 + i and -10.

a. f(x) = x³ - 10x² - 18x - 12

b. f(x) = x³ + 8x² + 20x - 18

c. f(x) = x³ + x² - 18x + 20

d. f(x) = x³ + 8x² - 18x + 20

Q31. Find the real solutions of the equation 3x³ - x² + 3x - 1 = 0.

a. {-3, 1/3, -1}

b. {1/3}

c. {1/3, -1}

d. {-3, -1/3, -1}