The area of the rectangle is (x^4+4x^3+3x^2-4x-4) and the length of the rectangle is (x^3+5x^2+8x+4) if area equals length times width what is the width of the rectangle

the functions have the same rate of change i think. i narrowed it down to this answer and "the rate of change of tour 1 is greater" but i got it wrong using that answer so im assuming its the answer above. (this is a question i also answered from the iready site if anyone needs a reference)