document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=44791>Question 44791</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Not sure what book this comes from. Please help.\r<BR>\n" );
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document.write( "Given P(x)=x^2-4x, find and simplify P(a+h)-P(a).\r<BR>\n" );
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document.write( "I get (x+2)(x-2). I think I'm supposed to substitute something somewhere. How do I work this? Thank you! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #29667 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=29667\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Given P(x)=x^2-4x, find and simplify P(a+h)-P(a)<BR>\n" );
document.write( "To get P(a+h) substitute \"a+h\" in place of \"x\", as follows:\r<BR>\n" );
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document.write( "P(a+h)=(a+h)^2-4(a+h)<BR>\n" );
document.write( "      =a^2+2ah+h^2-4a-4h<BR>\n" );
document.write( "To get P(a) substitute \"a\" in place of \"x\", as follows:<BR>\n" );
document.write( "P(a)=a^2-4a\r<BR>\n" );
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document.write( "Now subtract P(a) from P(a+h), as follows:\r<BR>\n" );
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document.write( "P(a+h)-P(a)=2ah+h^2-4h\r<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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