document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=852097>Question 852097</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Using the square root method how do I solve<BR>\n" );
document.write( "x^4-16=0 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #513131 by </B><A HREF=/tutors/aboutme.mpl?userid=Boston_Don><B>Boston_Don(1)</B></A><img src=\"/images/stars/iconNewId_16x16.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boston_Don><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=Boston_Don><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=513131\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E4-16=0 ALIGN=MIDDLE  ALT=\"x%5E4-16=0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E4=16 ALIGN=MIDDLE  ALT=\"x%5E4=16\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%28x%5E4%29=sqrt%2816%29 ALIGN=MIDDLE  ALT=\"sqrt%28x%5E4%29=sqrt%2816%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2=4 ALIGN=MIDDLE  ALT=\"x%5E2=4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%28x%5E2%29=sqrt%284%29 ALIGN=MIDDLE  ALT=\"sqrt%28x%5E2%29=sqrt%284%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=2 ALIGN=MIDDLE  ALT=\"x=2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "But we also have to consider the negative and imaginary solutions as well. <BR>\n" );
document.write( "The former gives us <BR>\n" );
document.write( "   X=2, -2<BR>\n" );
document.write( "For the latter <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=i%5E2=-1 ALIGN=MIDDLE  ALT=\"i%5E2=-1\"   DISABLED_style= \"max-width:90%; height:auto;\" > and hence <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=i%5E4=%28i%5E2%29%5E2=1 ALIGN=MIDDLE  ALT=\"i%5E4=%28i%5E2%29%5E2=1\"   DISABLED_style= \"max-width:90%; height:auto;\" > . <BR>\n" );
document.write( "This gives us the following two additional solutions<BR>\n" );
document.write( "   X=2i, -2i<BR>\n" );
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