Can someone help me with this plz plz !!

Solve the equation using the given values: x= -2.5; y= -7.51. 2xy + 2x²

At the beginning of year 1, carlos invests $600 at an annual compound interest rate of 4%. he makes no deposits to or withdrawals from the account. which explicit formula can be used to find the account's balance at the beginning of year 5? what is, the balance?

Could someone me with this question i’ve been stuck on it for 20 minutes