document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=685650>Question 685650</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can you please help me to understand how Re=1-(1-R)(1-R) becomes Re=2R-R^2. I multiplied out the brackets and was left with 1-1-R-R+R^2, which gave me -2R+R^2 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #424515 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=424515\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Re=1-(1-R)(1-R)<BR>\n" );
document.write( "Re = 1 - ( 1 - 2R + R^2 )<BR>\n" );
document.write( "Re = 1 - 1 + 2R - R^2<BR>\n" );
document.write( "Re = 2R - R^2<BR>\n" );
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