document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1044841>Question 1044841</A>: <I><SPAN STYLE=\"word-break: break-all;\"> please help me solve this equation. Find f(x + h) when f(x) = -3x+5 over 7x+4 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #660238 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=660238\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> f(x+h)=-3(x+h)+5/7(x+h)+4<BR>\n" );
document.write( "That is -3x-3h+5/(7x+7h+4)<BR>\n" );
document.write( "If they want f(x+h)-f(x)<BR>\n" );
document.write( "-3x-3h+5/(7x+7h+4)-(-3x+5)/(7x+4); common denominator is (7x+7h+4)(7x+4)<BR>\n" );
document.write( "The numerator is (-3x-3h+5)(7x+4)-(-3x+5)(7x+7h+4)<BR>\n" );
document.write( "=-21x^2-12x-21xh-12h+35x+20-(-21x^2-21xh-12x+35x+35h+20)<BR>\n" );
document.write( "=-21x^2-12x-21xh-12h+35x+20+21x^2+21xh+12x-35x-35h-20<BR>\n" );
document.write( "=-47/[7(x+h)+4](7x+4)<BR>\n" );
document.write( "=-47/(7x+4)^2 as h approaches 0.  This is the derivative.              <BR>\n" );
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