document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=392420>Question 392420</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Solve for y, where y is a real number.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+sqrt+%28y+%2B+20+=+y%29+ ALIGN=MIDDLE  ALT=\"+sqrt+%28y+%2B+20+=+y%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "If there is more than one solution, separate them with commas </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #278519 by </B><A HREF=/tutors/aboutme.mpl?userid=robertb><B>robertb(5830)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=robertb><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=robertb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=278519\">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%28y%2B20%29+=+y ALIGN=MIDDLE  ALT=\"sqrt%28y%2B20%29+=+y\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Square both sides:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+%2B+20+=+y%5E2 ALIGN=MIDDLE  ALT=\"y+%2B+20+=+y%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >,<BR>\n" );
document.write( "==> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0+=+y%5E2+-+y+-+20 ALIGN=MIDDLE  ALT=\"0+=+y%5E2+-+y+-+20\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "==> (y-5)(y+4) = 0 ==> y = 5, -4.<BR>\n" );
document.write( "Y = 5 satisfies the original equation, while y = -4 does not.<BR>\n" );
document.write( "Therefore the final answer is only y = 5. </SPAN>\n" );
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