document.write( "Question 1058454: Rationalize the denominator
\n" ); document.write( "(√ 7)/(√ 3+2)
\n" ); document.write( "I got as far as
\n" ); document.write( "(√ 7)/(√ 3+2) * (√ 3-2)/(√ 3-2)
\n" ); document.write( "[(√ 7)(√ 3+2)]/(√ 3)^2-(2)^2
\n" ); document.write( "[(√ 7)(√ 3+2)]/3+4
\n" ); document.write( "[(√ 7*√3)-(2√2)]/7
\n" ); document.write( "[(√21)-(2√2)]/7
\n" ); document.write( "My book is saying that the answer is (√21)-(2√2) Without a denominator. Did I do something wrong or is the book wrong (it's been wrong before). \n" ); document.write( "

Algebra.Com's Answer #673515 by Edwin McCravy(20056) $\"\"$ $\"About$

You can put this solution on YOUR website!

\r\n" );
document.write( "Looks like you made a sign error, 3+4 should have been 3-4.\r\n" );
document.write( "Multiply the bottoms using FOIL\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Use FOIL in the denominator:\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "[That was where you made your error]\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Yes the book is wrong!\r\n" );
document.write( "\r\n" );
document.write( "Edwin

\n" ); document.write( "

\n" );