Question 152518
{{{(2+h)^3 = (2+h)(2+h)(2+h)}}} You are ok up to this point.
{{{(2+h)(2+h) = 4+2h+2h+h^2}}} which simplifies to {{{4+4h+h^2}}} Now you multiply this by {{{(2+h)}}}
{{{(4+4h+h^2)(2+h) = 8+8h+2h^2+4h+4h^2+h^3}}} Combining like-terms, you get:
{{{8+12h+6h^2+h^3}}} So...
{{{g(2+h) = 8+12h+6h^2+h^3}}}