Sum of 12 and product of 9

Answer this question! 30 points and brainliest! only if you know the answer.

Each of the walls of a room with square dimensions has been built with two pieces of sheetrock, a smaller one and a larger one. the length of all the smaller ones is the same and is stored in the variable small. similarly, the length of all the larger ones is the same and is stored in the variable large. write a single expression whose value is the total area of this room. do not use any method invocations.

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x