document.write( "Question 377389: The sum of an integer and its square is 30. Find the integer. Please help \n" ); document.write( "
Algebra.Com's Answer #268172 by SadieKhan(31)![]() ![]() You can put this solution on YOUR website! Let x be the integer and x^2 be its square \n" ); document.write( "by requirement \n" ); document.write( "x^2+x=30 \n" ); document.write( "solving \n" ); document.write( "x^2+x-30=0 \n" ); document.write( "factorizing \n" ); document.write( "X^2+6x-5x-30=0 \n" ); document.write( "x(x+6)-5(x+6)=0 \n" ); document.write( "x-5=0,x+6=0 \n" ); document.write( "this implies \n" ); document.write( "x=5,-6 \n" ); document.write( "So it can be either a 5 or a -6. \n" ); document.write( " \n" ); document.write( " |