document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=55157>Question 55157</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0072549017/algebrahomeworkh>Beginning Algebra</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> If the sides of a square are decreased by 3 cm, the area is decreased by 81 cm^2. What were the dimensions of the origional square? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #37411 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley71><B>checkley71(8403)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley71><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=37411\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (X-3)(X-3)=X^2-81<BR>\n" );
document.write( "X^2-6X+9=X^2-81<BR>\n" );
document.write( "-6X=-81-9<BR>\n" );
document.write( "6X=90<BR>\n" );
document.write( "X=90/6<BR>\n" );
document.write( "X=15<BR>\n" );
document.write( "PROOF<BR>\n" );
document.write( "(15-3)(15-3)=15*15-81<BR>\n" );
document.write( "12*12=225-81 <BR>\n" );
document.write( "144=144<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );