Question 982818
{{{T=C(6,4)*x^(6-2)*2^2=15*4*x^4=60x^4}}}
.
.
{{{5!=5*4*3*2*1=120}}}
.
.
{{{P(n,r)=n!/(n-r)!}}}
.
.
{{{C(n,r)=n!/(r!(n-r)!)}}}
{{{C(4,4)=4!/(4!(4-4)!)}}}
{{{C(4,4)=1/0!}}}
{{{C(4,4)=1/1}}}
{{{C(4,4)=1}}}