Philip bought a pair of jeans that were on sale. The jeans cost $45 before the sale. The sale discount was $9. Which percent shows the discount Philip got on his jeans?

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