Question 976428
{{{a^3=a^2*a}}}
Subsitute {{{a^2=a+2}}}
{{{a^3=(a+2)*a}}}
{{{a^3=a^2+2a}}}
Subsitute {{{a^2=a+2}}}
{{{a^3=(a+2)+2a}}}
{{{a^3=3a+2}}}
Answer: (C) 3a + 2