document.write( "Question 456366: find the two digit number wich has the squere of the sum of its digits equal to the number obtaind by reversing it digit ? \n" ); document.write( "
Algebra.Com's Answer #313295 by ankor@dixie-net.com(22740)\"\" \"About 
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find the two digit number which has the square of the sum of its digits equal to the number obtained by reversing it digit?
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\n" ); document.write( "Let x = the 10's digit
\n" ); document.write( "Let y = the units
\n" ); document.write( "then
\n" ); document.write( "10x+y = the number
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\n" ); document.write( "(x + y)^2 = 10y + x
\n" ); document.write( "Rather than solving this equation, use some assumptions and logic
\n" ); document.write( "10y+x has to be perfect square which has two digits, not many of those.
\n" ); document.write( "Start with 81, then y=8, x=1
\n" ); document.write( "then 18 is the original number and sure enough (1+8)^2 = 81\r
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