Explain how to use multiplication to check the answer to a division problem

Match each polynomial with its factorization.

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

Factor the polynomial expression x6 – x3 – 20