document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=836236>Question 836236</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Given that f(x) = 2x^2 - x + 5 , find<BR>\n" );
document.write( "a) f(-1)<BR>\n" );
document.write( "b) f(a+2)<BR>\n" );
document.write( "Thanks so much in advance:) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #504046 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=504046\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Given that f(x) = 2x^2 - x + 5 , find<BR>\n" );
document.write( "a) f(-1)<BR>\n" );
document.write( "b) f(a+2)<BR>\n" );
document.write( "Thanks so much in advance:)\r<BR>\n" );
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document.write( "a)\r<BR>\n" );
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document.write( "Plug in x = -1 and evaluate.\r<BR>\n" );
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document.write( "f(x) = 2x^2 - x + 5\r<BR>\n" );
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document.write( "f(-1) = 2(-1)^2 - (-1) + 5 ... replace ALL copies of x with -1 (since x = -1)\r<BR>\n" );
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document.write( "f(-1) = 2(1) - (-1) + 5\r<BR>\n" );
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document.write( "f(-1) = 2 + 1 + 5\r<BR>\n" );
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document.write( "f(-1) = <font color=\"red\">8</font>\r<BR>\n" );
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document.write( "b)\r<BR>\n" );
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document.write( "Plug in x = a+2 and simplify.\r<BR>\n" );
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document.write( "f(x) = 2x^2 - x + 5\r<BR>\n" );
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document.write( "f(a+2) = 2(a+2)^2 - (a+2) + 5 ... replace ALL copies of x with a+2 (since x = a+2)\r<BR>\n" );
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document.write( "f(a+2) = 2(a+2)(a+2) - (a+2) + 5\r<BR>\n" );
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document.write( "f(a+2) = 2(a^2+4a+4) - (a+2) + 5\r<BR>\n" );
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document.write( "f(a+2) = 2a^2+8a+8 -a-2 + 5\r<BR>\n" );
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document.write( "f(a+2) = <font color=\"red\">2a^2+7a+11</font>\r<BR>\n" );
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