document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=287637>Question 287637</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me solve x^4 - 9 ? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #208386 by </B><A HREF=/tutors/aboutme.mpl?userid=Grinnell><B>Grinnell(63)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Grinnell><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=208386\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> How can we put this in familiar form?<BR>\n" );
document.write( "9 and 4 are perfect squares. These are hints at something.<BR>\n" );
document.write( "we know a^2-b^2 = (a+b)(a-b)\r<BR>\n" );
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document.write( "we can do this! x^2^2-3^2=(x^2+3)(x^2-3)=0<BR>\n" );
document.write( "3^2+3=0, x=Square root of 3i<BR>\n" );
document.write( "3^2-3=0, x=Square root of 3\r<BR>\n" );
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document.write( "This is not as complicated as it looks, but you must use the common products of Algebra AND be on the look-out for perfect squares either in the exponents or the real numbers themselves.\r<BR>\n" );
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document.write( "square root of 3i AND the square root of 3 are the answers. </SPAN>\n" );
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