Module 6 polynomial the question is in the picture. alana completed a problem where she had to find the sum of the polynomials (3x^2+8x-4) and (-8x^3-3x+4). her answer is 0. complete the explanation and correct her mistake. when graphed, how many times does the sum change directions? ?

a rectangular plot of land has a length of (2x^2+5x-20) and a width of (3x+4). what is the polynomial representing the area of the plot of land? explain how you got your answer. below.