Find the roots of the polynomial equation - x^3+5x^2 - 11x+55=0

x³ + 5x² - 11x + 55 = 0

x² (x) + x² (5) - 11 (x) - 11 (5) = 0

(x² (x + 5) - 11 (x + 5) = 0

(x² - 11) (x + 5) = 0

x² - 11 = 0 or x + 5 = 0

+ 11 + 11 - 5 - 5

x² = 11 or x = - 5

x = ±√ (11) or x = - 5

THere are three roots in the polynomial equation.