document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=851501>Question 851501</A>: <I><SPAN STYLE=\"word-break: break-all;\"> simplify sqrt x^2-9 as much as possible after substituting 3csc theta \r<BR>\n" );
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document.write( "I can only get to sqrt{3csc^2} - 9.  Do I FOIL? </SPAN>\n" );
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document.write( "I will use t for theta. No foil needed.\r<BR>\n" );
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document.write( "sqrt{(3csct)^2-9}\r<BR>\n" );
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document.write( "sqrt{9*csc^2 t - 9}\r<BR>\n" );
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document.write( "In the radical, factor out 9.\r<BR>\n" );
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document.write( "sqrt{9(csc^2 t - 1)}\r<BR>\n" );
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document.write( "Separate into two integrals.\r<BR>\n" );
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document.write( "sqrt(9)*sqrt(csc^2 t - 1)\r<BR>\n" );
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document.write( "3*sqrt{(csct-1)(csct+1)\r<BR>\n" );
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document.write( "Did you follow?\r<BR>\n" );
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document.write( " </SPAN>\n" );
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