Practice problem
Expand (x+1)(x2+2x+1)(x+1)(x^2 + 2x + 1)(x+1)(x2+2x+1).
x2+3x+3x^2 + 3x + 3x2+3x+3
x3+3x2+3x+3x^3 + 3x^2 + 3x + 3x3+3x2+3x+3
x3+3x2+3x+1x^3 + 3x^2 + 3x + 1x3+3x2+3x+1
x3+x2+2x+1x^3 + x^2 + 2x + 1x3+x2+2x+1
Type a concept, like “slope” or “photosynthesis”.
