document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=719865>Question 719865</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hello can someone show me how to write the square root of -9 +8 (which is not under the square root sign  as a comples number in standard form.\r<BR>\n" );
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document.write( "and is x^2-x-1 a prime quadratic .what is a prime qudratic.Thanks </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #441682 by </B><A HREF=/tutors/aboutme.mpl?userid=jsmallt9><B>jsmallt9(3758)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jsmallt9><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=441682\">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=sqrt%28-9%29%2B8 ALIGN=MIDDLE  ALT=\"sqrt%28-9%29%2B8\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%289%2A%28-1%29%29%2B8 ALIGN=MIDDLE  ALT=\"sqrt%289%2A%28-1%29%29%2B8\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%289%29%2Asqrt%28-1%29%2B8 ALIGN=MIDDLE  ALT=\"sqrt%289%29%2Asqrt%28-1%29%2B8\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "3*i+8<BR>\n" );
document.write( "8 + 3i<br><BR>\n" );
document.write( "If the discriminant, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=b%5E2-4ac ALIGN=MIDDLE  ALT=\"b%5E2-4ac\"   DISABLED_style= \"max-width:90%; height:auto;\" >, is a perfect square then the quadratic will factor (i.e. it is not prime). If the discriminant is not a perfect square then the quadratic is prime.<br><BR>\n" );
document.write( "For <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2-x-1 ALIGN=MIDDLE  ALT=\"x%5E2-x-1\"   DISABLED_style= \"max-width:90%; height:auto;\" > the discriminant is:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28-1%29%5E2-4%281%29%28-1%29+=+1-4%281%29%28-1%29+=+1%2B4+=+5 ALIGN=MIDDLE  ALT=\"%28-1%29%5E2-4%281%29%28-1%29+=+1-4%281%29%28-1%29+=+1%2B4+=+5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "5 is not a perfect square so <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2-x-1 ALIGN=MIDDLE  ALT=\"x%5E2-x-1\"   DISABLED_style= \"max-width:90%; height:auto;\" > is prime. </SPAN>\n" );
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