Question 1083737
<pre<
{{{0 = 1-1 = (1-1)^n = (1^""+(-1))^n}}}{{{""=""}}} <--expand by the binomial theorem:

{{{matrix(1,9,
"C(n,0)"1^n*(-1)^0,
""+"",
"C(n,1)"1^(n-1)*(-1)^1,
""+"",
"C(n,2)"1^(n-2)*(-1)^2,
""+"",
""*""*""*"",
""+"",
"C(n,n)"1^0*(-1)^n))}}}{{{""=""}}}

{{{matrix(1,9,
"C(n,0)"1*1,
""+"",
"C(n,1)"1*(-1),
""+"",
"C(n,2)"1^(n-2)*(1),
""+"",
""*""*""*"",
""+"",
"C(n,n)"1*(-1)^n))}}}{{{""=""}}}


{{{matrix(1,9,
"C(n,0)",
""+"",
"C(n,1)"(-1),
""+"",
"C(n,2)",
""+"",
""*""*""*"",
""+"",
"C(n,n)"(-1)^n))}}}{{{""=""}}}  

{{{matrix(1,9,
"C(n,0)",
""-"",
"C(n,1)",
""+"",
"C(n,2)",
""+"",
""*""*""*"",
"" +- "",
1)}}}

Edwin</pre>