Word problem solving by quadratic equation.

Q1) The difference between two numbers is 14 and the difference between their square is 448. Find the numbers. Q2) The speed of an express train is x km/ h and the speed of an ordinary train is 12 km/h less than that of the express train. If the ordinary train takes one hour longer than the express train to cover a distance of 240 km, find the speed of the express train.