document.write( "Question 661795: Says to factor the difference of two squares. Assume that variables represent whole numbers.\r
\n" ); document.write( "\n" ); document.write( "(y-9)^2-1
\n" ); document.write( "

Algebra.Com's Answer #411799 by math-vortex(648)\"\" \"About 
You can put this solution on YOUR website!
\r\n" );
document.write( "Hi, there--\r\n" );
document.write( "\r\n" );
document.write( "Problem: \r\n" );
document.write( "Factor this expression using the difference of two squares. Assume that variables represent whole numbers.\r\n" );
document.write( "\r\n" );
document.write( "\"%28y-9%29%5E2-1\"\r\n" );
document.write( "\r\n" );
document.write( "Answer:\r\n" );
document.write( "The difference of two square factoring method is useful when you have one expression \r\n" );
document.write( "subtracted from another AND you can write both expressions in the form of something-\r\n" );
document.write( "squared.\r\n" );
document.write( "\r\n" );
document.write( "In this case, you subtract 1 from (y-9}^2. Both of these can be written as something-squared:\r\n" );
document.write( " 1 = 1^2 and (y-9)^2 is already in that form. \r\n" );
document.write( "\r\n" );
document.write( "Difference of two squares factors like this:\r\n" );
document.write( "\"a%5E2-b%5E2+=+%28a%2Bb%29%2A%28a-b%29\"\r\n" );
document.write( "\r\n" );
document.write( "In your problem:\r\n" );
document.write( "\"%28y-9%29%5E2-1=%28%28y-9%29%2B1%29%2A%28%28y-9%29-1%29\"\r\n" );
document.write( "\r\n" );
document.write( "We can simplify this:\r\n" );
document.write( "\"%28y-9%29%5E2-1=%28y-8%29%2A%28y-10%29\"\r\n" );
document.write( "\r\n" );
document.write( "~Mrs. F.\r\n" );
document.write( "
\r
\n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "
\n" );