Question

Help: (x + 2)4 = x4 + 8x3 +... Use the Binomial Theorem to complete the binomial expansion. Enter only the next three terms; use the ^ key for exponents, example: 10x^2+20x+30.
I got this as the answer but it marks it as incorrect.:
x^4+8x^3+32x+16

Answer 1

use Pascal's triangle

Answer 2

or you could expand it out