document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=549818>Question 549818</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the real roots of f(x)=x^4-16 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #358092 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=358092\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> f(x) = x^4-16\r<BR>\n" );
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document.write( "0 = x^4-16\r<BR>\n" );
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document.write( "x^4-16 = 0\r<BR>\n" );
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document.write( "(x^2-4)(x^2+4) = 0\r<BR>\n" );
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document.write( "(x-2)(x+2)(x^2+4) = 0\r<BR>\n" );
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document.write( "x-2=0, x+2=0, or x^2+4=0\r<BR>\n" );
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document.write( "x=2, x=-2, x=2i, or x=-2i\r<BR>\n" );
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document.write( "So the real roots are 2 and -2 </SPAN>\n" );
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