document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=985949>Question 985949</A>: <I><SPAN STYLE=\"word-break: break-all;\"> use factoring and the zero product property to solve the following problem<BR>\n" );
document.write( "9r^2-30r+21=-4 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #606917 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=606917\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 9r^2 -30r + 21 = -4<BR>\n" );
document.write( "add 4 to both sides<BR>\n" );
document.write( "9r^2 - 30r + 21 + 4 = 0<BR>\n" );
document.write( "9r^2 - 30r + 25 = 0<BR>\n" );
document.write( "factors (a perfect square) to <BR>\n" );
document.write( "(3r - 5)(3r - 5) = 0<BR>\n" );
document.write( "solutions<BR>\n" );
document.write( "3r = 5 twice<BR>\n" );
document.write( "r = 5/3 and r = 5/3<BR>\n" );
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