Lisa read 1/3 of a book in the morning, and she read some more at night. By the end of the day, she still had 1/5
of the book left to read. How much of the book did Lisa read at night?

Answer asap! show all work! find the number of complex roots, the possible number of real roots and the possible rational roots of the polynomial function. then, solve for all roots. x^3 + 2x^2 + 3x + 6 = 0