document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1169801>Question 1169801</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A well-known fact is that a negative number multiplied by a negative number yields a positive number, or, in other words, that (−1)(−1)=1. When asked to justify this, three students reasoned as follows:\r<BR>\n" );
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document.write( "Student 1:\r<BR>\n" );
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document.write( "\" Take the number line. Subtracting the smaller from the larger should give us the distance between two numbers. Now consider 0 and −1 on the number line.<BR>\n" );
document.write( "The distance between them should be 1. So we have that<BR>\n" );
document.write( "0−(−1)=1⟹−(−1)=1⟹(−1)(−1)=1<BR>\n" );
document.write( "This proves the claim.\"\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #794645 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13198)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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/cgi-bin/show-face.mpl?user=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=794645\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "(1) Your post only shows the response by one of the three students.<br><BR>\n" );
document.write( "(2) There is no question in your post.<br><BR>\n" );
document.write( "(3) The argument shown for the one student involves subtraction; it has nothing to do with multiplication.<br><BR>\n" );
document.write( "Re-post your problem, showing all the given information, and asking an actual question.<br><BR>\n" );
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