Levi deposits $500 into a savings account that earns interest compounded anually. Let "r" br the annual interest rate. After two years, the balance from the first deposit is given by the polynomial 500+1000r+50r*. A year after making the first deposit, levi makes another deposit. A year later, the balance is 600+600r. Find the balance of the accounts combined in terms of r after 2 years