Question 1041257
<pre>
{{{matrix(1,7,
ITSELF,
""+"",
(matrix(3,1,TWICE,ITS,SQUARE)),
"",
""="",
"",
10)}}}

          {{{matrix(1,7,
x,
""+"",
2x^2,
"",
""="",
"",
10)}}}

         {{{matrix(1,7,
2x^2,
""+"",
x,
"",
""="",
"",
10)}}}

   {{{matrix(1,9,
2x^2,
""+"",
x,
"",
""-"",
10,
""="",
"",
0)}}}

  {{{matrix(1,8,
"(x",
""-"",
"2)(2 x",
""-"",
"5)",
""="",
"",
0)}}}

{{{matrix(1,16,
x,
""-"",
2,
"",
""="",
"",
0,
"",
"",
"",
2x,
""+"",
5,
"",
""="",
0)}}}

{{{matrix(1,13,
x,
"",
""="",
2,
"",
"",
"",
"",
2x,
"",
""="",
"",
5)}}}

            {{{matrix(1,5,
x,
"",
""="",
"",
5/2)}}}

Since {{{5/2}}} is not a whole number, we discard it as 
a solution.  Therefore the only solution is:

{{{matrix(1,5,
x,
"",
""="",
"",
2)}}}

Edwin</pre>