An investment of $2000 is deposited at a certain annual interest rate. One year later, $3000 is deposited in another account at the same rate. At the end of the second year, the accounts have a total value of $5892.21. The interest rate r can be found by solving the equation 2000(1 + r)2 + 3000(1 + r) = 5892.21. What is the interest rate? After writing the equation in standard form with a > O, a = , b = , and c=