document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=48379>Question 48379</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0131469630/algebrahomeworkh></A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Having already submitted one question, there is another along the same line I find equally confusing:\r<BR>\n" );
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document.write( "Given the function f(x)= -7x^2 -14x +9, is the point (-2, -5) on the graph of f?\r<BR>\n" );
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document.write( "Does the y=mx+b formula apply here, I just don't know, any help will be greatly appreciated </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #32025 by </B><A HREF=/tutors/aboutme.mpl?userid=Earlsdon><B>Earlsdon(6294)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Earlsdon><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=32025\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Does the point (-2, -5) lie on the graph of <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=f%28x%29+=+-7x%5E2-14x%2B9 ALIGN=MIDDLE  ALT=\"f%28x%29+=+-7x%5E2-14x%2B9\"   DISABLED_style= \"max-width:90%; height:auto;\" >?<BR>\n" );
document.write( "Write your function in the form:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+-7x%5E2-14x%2B9 ALIGN=MIDDLE  ALT=\"y+=+-7x%5E2-14x%2B9\"   DISABLED_style= \"max-width:90%; height:auto;\" > and substitute x = -2, and y = -5 and see if the two sides are equal.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-5+=+-7%28-2%29%5E2-14%28-2%29%2B9 ALIGN=MIDDLE  ALT=\"-5+=+-7%28-2%29%5E2-14%28-2%29%2B9\"   DISABLED_style= \"max-width:90%; height:auto;\" > Simplify.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-5+=+-7%284%29%2B28%2B9 ALIGN=MIDDLE  ALT=\"-5+=+-7%284%29%2B28%2B9\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-5+=+-28%2B28%2B9 ALIGN=MIDDLE  ALT=\"-5+=+-28%2B28%2B9\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-5+=+9 ALIGN=MIDDLE  ALT=\"-5+=+9\"   DISABLED_style= \"max-width:90%; height:auto;\" > Not true!\r<BR>\n" );
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document.write( "The point (-2, -5) does not lie on the graph of <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=f%28x%29+=+-7x%5E2-14x%2B9 ALIGN=MIDDLE  ALT=\"f%28x%29+=+-7x%5E2-14x%2B9\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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