*30 points* find all the zeroes of the polynomial function f(x)=x^3-5x^2+6x-30. if you use synthetic division, show all three lines of numbers.

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )