If the speed limit is 80 kilometers per hour and davells aunt was driving 75 miles per hour was she speeding by how much? WILL MARK NO BOTS

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