document.write( "Question 204320: Three times the square of a certain postive number exceeds six times the number by nine. Find the number? \n" ); document.write( "
Algebra.Com's Answer #154254 by RAY100(1637)![]() ![]() ![]() You can put this solution on YOUR website! 3n^2 -9 = 6n,,,,,where n = number \n" ); document.write( ". \n" ); document.write( "3n^2 -6n -9 =0 \n" ); document.write( ". \n" ); document.write( "(3n+3)(n-3) =0 \n" ); document.write( ". \n" ); document.write( "n= -1,,3 \n" ); document.write( ". \n" ); document.write( "check \n" ); document.write( "(-1),,3(-1)^2 -9 =6(-1),,,3-9=-6,,,,ok \n" ); document.write( "(3),,,3(3)^2 -9 =6(3),,,,27-9=18,,,,ok \n" ); document.write( ". \n" ); document.write( " |