document.write( "Question 247085:
\n" ); document.write( "I am confused on how to simplify this fraction. The text book says the answer is not 2x-8, which is what I would have come up with. It says, \"choose the value of X to show that this answer is not true.\" I am confused. The problem is:\r
\n" ); document.write( "\n" ); document.write( "2X^2-32/x-4\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Thanks, Lynda (attempting to teach my son algebra)
\n" ); document.write( "

Algebra.Com's Answer #180311 by nerdybill(7384)\"\" \"About 
You can put this solution on YOUR website!

\n" ); document.write( "2X^2-32/x-4
\n" ); document.write( ".
\n" ); document.write( "Factoring a 2 from the numerator:
\n" ); document.write( "[2(X^2-16)]/x-4
\n" ); document.write( "[2(X+4)(X-4)]/x-4
\n" ); document.write( "Canceling x-4:
\n" ); document.write( "2(X+4)
\n" ); document.write( "2X+8
\n" ); document.write( ".
\n" ); document.write( "This will NOT be true if X=4 -- notice the denominator goes to zero making it undefined.
\n" ); document.write( "
\n" ); document.write( "
\n" );