Okay, to find the area, the formula is length times width. So you would multiply the two expressions together. It will look something like this:
[tex]4x^{3}(x^{3} + 3x^{2} +2x)[/tex]
The answer would be:
4x^6+12x^5+8x^4
Let me know if you need further explanation. I hope this helps.
