document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=570947>Question 570947</A>: <I><SPAN STYLE=\"word-break: break-all;\"> what is the simplify radical of 686 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #367860 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=367860\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%28686%29 ALIGN=MIDDLE  ALT=\"sqrt%28686%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > Start with the given expression\r<BR>\n" );
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document.write( "The goal of simplifying expressions with square roots is to factor the radicand into a product of two numbers. One of these two numbers must be a perfect square. When you take the square root of this perfect square, you will get a rational number.\r<BR>\n" );
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document.write( "So let's list the factors of 686\r<BR>\n" );
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document.write( "Factors:\r<BR>\n" );
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document.write( "1, 2, 7, 14, 49, 98, 343, 686\r<BR>\n" );
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document.write( "Notice how 49 is the largest perfect square, so lets factor 686 into 49*14\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%2849%2A14%29 ALIGN=MIDDLE  ALT=\"sqrt%2849%2A14%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > Factor 686 into 49*14<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%2849%29%2Asqrt%2814%29 ALIGN=MIDDLE  ALT=\"sqrt%2849%29%2Asqrt%2814%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > Break up the square roots using the identity <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%28x%2Ay%29=sqrt%28x%29%2Asqrt%28y%29 ALIGN=MIDDLE  ALT=\"sqrt%28x%2Ay%29=sqrt%28x%29%2Asqrt%28y%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7%2Asqrt%2814%29 ALIGN=MIDDLE  ALT=\"7%2Asqrt%2814%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > Take the square root of the perfect square 49 to get 7 <BR>\n" );
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document.write( "So the expression <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%28686%29 ALIGN=MIDDLE  ALT=\"sqrt%28686%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > simplifies to <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7%2Asqrt%2814%29 ALIGN=MIDDLE  ALT=\"7%2Asqrt%2814%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Check:\r<BR>\n" );
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document.write( "Notice if we evaluate the square root of 686 with a calculator we get\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%28686%29=26.1916017074176 ALIGN=MIDDLE  ALT=\"sqrt%28686%29=26.1916017074176\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "and if we evaluate <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7%2Asqrt%2814%29 ALIGN=MIDDLE  ALT=\"7%2Asqrt%2814%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > we get\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7%2Asqrt%2814%29=26.1916017074176 ALIGN=MIDDLE  ALT=\"7%2Asqrt%2814%29=26.1916017074176\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "This shows that <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%28686%29=7%2Asqrt%2814%29 ALIGN=MIDDLE  ALT=\"sqrt%28686%29=7%2Asqrt%2814%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >. So this verifies our answer  </SPAN>\n" );
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