27x^3 - 45x^2 - 39x - 7
To find this, you can use either the FOIL method or the box method.
In this case, I used the FOIL method where I multiples 9x^2 by 3x + 1 and continued my way down on the first equation.
After multiplying, I combined like terms to receive my final answer:
Hope this helps!
