Practice problem
If a rectangle has a length of x−4x - 4x−4 and a width of 3x+13x + 13x+1, what is its area?
3x2+13x+33x^2 + 13x + 33x2+13x+3
3x2−11x−43x^2 - 11x - 43x2−11x−4
3x2−12x−33x^2 - 12x - 33x2−12x−3
x2+4x+4x^2 + 4x + 4x2+4x+4
Type a concept, like “slope” or “photosynthesis”.