document.write( "Question 827350: if the 1st,2nd and 3rd digits are all the same. together they form a 3-digit number that is 70 less than the square of the product of the first two digits. what is the 3-digit number? \n" ); document.write( "
Algebra.Com's Answer #498668 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! if the 1st,2nd and 3rd digits are all the same. \n" ); document.write( " together they form a 3-digit number that is 70 less than the square of the product of the first two digits. \n" ); document.write( " what is the 3-digit number? \n" ); document.write( ": \n" ); document.write( "100n + 10n + n = n^2 - 70 \n" ); document.write( "111n = (n*n)^2 - 70 \n" ); document.write( "0 = n^4 - 111n - 70 \n" ); document.write( "Let's try n = 5 \n" ); document.write( "625 - 555 - 70 \n" ); document.write( ": \n" ); document.write( "555 is the number \n" ); document.write( " |