8 t ^ 2 + 4 t ^ 2 - 8 4 t
If you multiply them all you get 3.0519273e+15 as your answer.
alright then, 12x + 17 = 66! we started with 17 and there is twelve months with x amount of inches grown plus the already 17 that equals the total 66
so it is 12x + 17 = 66
