document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=30330>Question 30330</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Quesion : Solve for y: y^4-4y^2=40y-10y^3\r<BR>\n" );
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document.write( "y=     or y=     or y=     or y=    \r<BR>\n" );
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document.write( "Possible Answers:<BR>\n" );
document.write( "(a) 0, 10, 2, -2<BR>\n" );
document.write( "(b) 0, -10, -2, 4<BR>\n" );
document.write( "(c) 0, -10, 2, -2<BR>\n" );
document.write( "(d) 0, 10, -2, -4<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #17228 by </B><A HREF=/tutors/aboutme.mpl?userid=Fermat><B>Fermat(136)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fermat><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=Fermat><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=17228\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> y^4-4y^2=40y-10y^3 <BR>\n" );
document.write( "rearrange,<BR>\n" );
document.write( "y^4 + 10y^3 = 4y^2 + 40y<BR>\n" );
document.write( "take out y^3 and y to get (y+10) as a factor<BR>\n" );
document.write( "y^3(y + 10) = y(4y + 40)<BR>\n" );
document.write( "y^3(y + 10) - 4y(y + 10)<BR>\n" );
document.write( "take out (y+10) as a common factor,<BR>\n" );
document.write( "(y+10)(y^3 - 4y) = 0<BR>\n" );
document.write( "(y+10)y(y² - 4) = 0<BR>\n" );
document.write( "y = -10, 0, or y = +/- 2<BR>\n" );
document.write( "y = -10, -2, 0, 2<BR>\n" );
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document.write( "Ans: (c)<BR>\n" );
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