document.write( "Question 512034: If a number is increased by 30. it is less than its square by 12. Find the number \n" ); document.write( "

Algebra.Com's Answer #342491 by oberobic(2304) $\"\"$ $\"About$

You can put this solution on YOUR website!
x+30 = x^2 -12
\n" ); document.write( ".
\n" ); document.write( "x^2 -x -42 = 0
\n" ); document.write( ".
\n" ); document.write( "(x-7)(x+6) = 0
\n" ); document.write( ".
\n" ); document.write( "x = 7 or -6
\n" ); document.write( ".
\n" ); document.write( "Test to see if both are correct.
\n" ); document.write( ".
\n" ); document.write( "7+30 = 37
\n" ); document.write( "7*7 = 49
\n" ); document.write( "49-12 = 37
\n" ); document.write( "correct
\n" ); document.write( ".
\n" ); document.write( "-6+30 =24
\n" ); document.write( "-6*-6 = 36
\n" ); document.write( "36-12 =24
\n" ); document.write( "correct.
\n" ); document.write( ".
\n" ); document.write( "Answer: Both 7 and -6 are solutions.
\n" ); document.write( ".
\n" ); document.write( "Done. \n" ); document.write( "

\n" );