document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1106371>Question 1106371</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Did the way my school factored this make sense or is there an easier way to solve this?\r<BR>\n" );
document.write( "\n" );
document.write( "y^4 + y^2 - 6\r<BR>\n" );
document.write( "\n" );
document.write( "Their solution:\r<BR>\n" );
document.write( "\n" );
document.write( "When a problem looks slightly odd, we can make it appear more natural to us <BR>\n" );
document.write( "by using substitution (a procedure needed for calculus). Let u=y^2. Factor the expression with u’s. Then, substitute the y^2 back in place of the u’s. If you can factor more, proceed. Otherwise, you are done. \r<BR>\n" );
document.write( "\n" );
document.write( "1.(y^2-2)(y^2+3)<BR>\n" );
document.write( "2. y^4+y^2-6<BR>\n" );
document.write( "3. u^2+u-6<BR>\n" );
document.write( "4. (u2-2)(u+3) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #721399 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39627)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=721399\">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=y%5E4%2By%5E2-6 ALIGN=MIDDLE  ALT=\"y%5E4%2By%5E2-6\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=u=y%5E2 ALIGN=MIDDLE  ALT=\"u=y%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "-\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=u%5E2%2Bu-6 ALIGN=MIDDLE  ALT=\"u%5E2%2Bu-6\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28u%2B3%29%28u-2%29 ALIGN=MIDDLE  ALT=\"%28u%2B3%29%28u-2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "substitute back for u.\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28y%5E2%2B3%29%28y%5E2-2%29 ALIGN=MIDDLE  ALT=\"%28y%5E2%2B3%29%28y%5E2-2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "DONE. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );