document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=90812>Question 90812</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I have to multiply using the vertical method.  Can I get some assistance and somebody to explain how the process is done?\r<BR>\n" );
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document.write( "(2r - 3s)( 4r^2 + 6rs + 9s^2)\r<BR>\n" );
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document.write( "Thanks. </SPAN>\n" );
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document.write( "     (2r - 3s)( 4r^2 + 6rs + 9s^2) \r<BR>\n" );
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document.write( "   For vertical multiplication  adopt the principal used for integers\r<BR>\n" );
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document.write( "              (4r^2+6rs+9s^2)(2r-3s)\r<BR>\n" );
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document.write( "              (4r^2+6rs+9s^2)(2r) = 8r^3+12r^2s+18rs^2\r<BR>\n" );
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document.write( "              (4r^2+6rs+9s^2)(-3s) =    -12r^2s-18rs^2-27s^3\r<BR>\n" );
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document.write( "              adding th corresponding like terms  ,  we get \r<BR>\n" );
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document.write( "                      8r^3-27s^3 (12r^2s  &-12r^2s  is 0  and 18rs^2 &  -18rs^2 \r<BR>\n" );
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document.write( "                                              is  0)\r<BR>\n" );
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document.write( "             hence (4r^2+6rs+9s^2)(2r-3s) = 8r^3- 27s^3 </SPAN>\n" );
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