document.write( "Question 740142: The square of a number decreased by 4 times the number equals 21. Find the number \n" ); document.write( "
Algebra.Com's Answer #451506 by powercenter(3)![]() ![]() ![]() You can put this solution on YOUR website! x= the number \r \n" ); document.write( "\n" ); document.write( "x^2-4x=21 \n" ); document.write( "x^2-4x-21=0\r \n" ); document.write( "\n" ); document.write( "(x+3)(x-7)=0 \n" ); document.write( "x=-3 \n" ); document.write( "x=7 \n" ); document.write( " |