document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=523980>Question 523980</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 1.(5x+2)(5x-2)-(x+3)^2<BR>\n" );
document.write( "my answer is <BR>\n" );
document.write( "(5x+2)(5x-2)=5x^2-2^2=25x-4<BR>\n" );
document.write( "-(x+3)^2 = -x2+x*2*3+32= -x2+6x+9<BR>\n" );
document.write( "-x2+6x+9+25x-4=-x2+31x+5.\r<BR>\n" );
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document.write( "2.solving Y=2x+1  <BR>\n" );
document.write( "          Y=3x-1 <BR>\n" );
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document.write( "when i do that with the calculater i get diffrent result then when solve it with algebraic solution \r<BR>\n" );
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document.write( "this is what i get from the calculator 1,7x;4,49y and this is what i get when i try algebraic solution 2,5x;6y \r<BR>\n" );
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document.write( "plz help and tell me what i am doing wrong. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #347506 by </B><A HREF=/tutors/aboutme.mpl?userid=Edwin+McCravy><B>Edwin McCravy(20060)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Edwin+McCravy><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=Edwin+McCravy><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=347506\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1.(5x+2)(5x-2)-(x+3)^2<BR>\n" );
document.write( "my answer is <BR>\n" );
document.write( "(5x+2)(5x-2)=5x^2-2^2=25x-4<BR>\n" );
document.write( "-(x+3)^2 = -x2+x*2*3+32= -x2+6x+9<BR>\n" );
document.write( "-x2+6x+9+25x-4=-x2+31x+5.<BR>\n" );
document.write( "<PRE STYLE=\"white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;\">\r\n" );
document.write( "There are two mistakes here.  You didn't square x \r\n" );
document.write( "in the first step.  It should be:\r\n" );
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document.write( "(5x+2)(5x-2) = (5x)²-4 = 25x²-4\r\n" );
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document.write( "And you didn't put parentheses around the whole\r\n" );
document.write( "expression in the next step.  It should be:\r\n" );
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document.write( "-(x+3)² = -(x²+x*2*3+3²) = -(x²+6x+9) = -x²-6x-9\r\n" );
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document.write( "-x²-6x-9+25x²-4 = 24x²-6x-13.\r\n" );
document.write( "</PRE><BR>\n" );
document.write( "2.solving Y=2x+1  <BR>\n" );
document.write( "          Y=3x-1 <BR>\n" );
document.write( " <BR>\n" );
document.write( "when i do that with the calculater i get diffrent result then when solve it with algebraic solution \r<BR>\n" );
document.write( "\n" );
document.write( "this is what i get from the calculator 1,7x;4,49y and this is what i get when i try algebraic solution 2,5x;6y \r<BR>\n" );
document.write( "\n" );
document.write( "plz help and tell me what i am doing wrong.<BR>\n" );
document.write( "<PRE STYLE=\"white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;\">\r\n" );
document.write( "Y=2x+1  \r\n" );
document.write( "Y=3x-1\r\n" );
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document.write( "Since the right sides both equal to Y, set them equal to each other:\r\n" );
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document.write( "2x+1=3x-1\r\n" );
document.write( "  -x=-2\r\n" );
document.write( "   x=2\r\n" );
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document.write( "Sustitute x=2 in the first one:\r\n" );
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document.write( "Y=2x+1\r\n" );
document.write( "Y=2(2)+1\r\n" );
document.write( "Y=4+1\r\n" );
document.write( "Y=5\r\n" );
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document.write( "Solution (x,Y) = (2,5)\r\n" );
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document.write( "Edwin</PRE>  </SPAN>\n" );
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