document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=808200>Question 808200</A>: <I><SPAN STYLE=\"word-break: break-all;\"> if roots of the quadratic equation x^2-31+a=0 are prime numbers , then the value of a is ? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #486854 by </B><A HREF=/tutors/aboutme.mpl?userid=JBarnum><B>JBarnum(2146)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=JBarnum><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=JBarnum><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=486854\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> through guess n check a=6<BR>\n" );
document.write( "x^2+(-31+6)=0<BR>\n" );
document.write( "x^2-25=0<BR>\n" );
document.write( "x=5 x=-5<BR>\n" );
document.write( "which 5 and -5 are prime numbers<BR>\n" );
document.write( "hope you find a better way to do it.<BR>\n" );
document.write( "oh just got it...take the same prime number square it multiply it by -1 then add it to -31 to find the value of a<BR>\n" );
document.write( "so for the prime number 2:<BR>\n" );
document.write( "2^2=4 * -1<BR>\n" );
document.write( "-31+a=-4<BR>\n" );
document.write( "a=27<BR>\n" );
document.write( "so for the prime number 3:<BR>\n" );
document.write( "3^2=9 * -1<BR>\n" );
document.write( "-31+a=-9<BR>\n" );
document.write( "a=22<BR>\n" );
document.write( "so for the prime number 5:<BR>\n" );
document.write( "5^2=25 * -1<BR>\n" );
document.write( "-31+a=-25<BR>\n" );
document.write( "a=6<BR>\n" );
document.write( "so for the prime number 7:<BR>\n" );
document.write( "7^2=49 * -1<BR>\n" );
document.write( "-31+a=-49<BR>\n" );
document.write( "a=-11\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
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