document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=125798>Question 125798</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Given f(x)= 5x^2-3x+1, find f(-2) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #92170 by </B><A HREF=/tutors/aboutme.mpl?userid=bucky><B>bucky(2189)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=bucky><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=92170\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> To do this problem you start with the given function:<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=f%28x%29=+5x%5E2-3x%2B1 ALIGN=MIDDLE  ALT=\"f%28x%29=+5x%5E2-3x%2B1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "When you see f(-2) all that means is for you to go to the given function, replace every x with<BR>\n" );
document.write( "-2 and simplify the answer.<BR>\n" );
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document.write( "So you start with:<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=f%28x%29=+5x%5E2-3x%2B1 ALIGN=MIDDLE  ALT=\"f%28x%29=+5x%5E2-3x%2B1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "wherever you see an x replace it with -2 and you get:<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=f%28-2%29+=+5%28-2%29%5E2+-+3%28-2%29+%2B+1 ALIGN=MIDDLE  ALT=\"f%28-2%29+=+5%28-2%29%5E2+-+3%28-2%29+%2B+1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "For the first term on the right side you square the -2 to get +4 and you multiply that<BR>\n" );
document.write( "by 5 to get +20. For the second term on the right side you multiply the -3 by the -2 and<BR>\n" );
document.write( "you get +6. Substituting these two results into the equation gives:<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=f%28-2%29+=+20+%2B+6+%2B+1 ALIGN=MIDDLE  ALT=\"f%28-2%29+=+20+%2B+6+%2B+1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "This means that the answer is:<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=f%28-2%29+=+27 ALIGN=MIDDLE  ALT=\"f%28-2%29+=+27\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "And that's the answer to this problem.<BR>\n" );
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document.write( "Hope this helps you to understand in general how, when you are given f(x), you can find<BR>\n" );
document.write( "f(A) ... just substitute A wherever you see an x in f(x).<BR>\n" );
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