document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1208026>Question 1208026</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If f(x) = 3x^2 - Bx + 4, and f(-1) = 12, what is the value of B?\r<BR>\n" );
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document.write( "Let me give it a try.\r<BR>\n" );
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document.write( "Let x = -1 and f(-1) be 12.\r<BR>\n" );
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document.write( "3(-1)^2 - B(-1) + 4\r<BR>\n" );
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document.write( "12 = 3(-1)^2 -B(-1) + 4\r<BR>\n" );
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document.write( "12 = 3(1) + B + 4\r<BR>\n" );
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document.write( "12 = 3 + B + 4\r<BR>\n" );
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document.write( "12 = B + 7\r<BR>\n" );
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document.write( "12 - 7 = B\r<BR>\n" );
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document.write( "5 = B\r<BR>\n" );
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document.write( "You say? \r<BR>\n" );
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document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #846143 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=846143\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=f%28-1%29=12 ALIGN=MIDDLE  ALT=\"f%28-1%29=12\"   DISABLED_style= \"max-width:90%; height:auto;\" > means that the point  (-1,12) is a point on the function f.\r<BR>\n" );
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document.write( "Use that known point for x and f(x).\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=12=3%28-1%29%5E2-B%28-1%29%2B4 ALIGN=MIDDLE  ALT=\"12=3%28-1%29%5E2-B%28-1%29%2B4\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3%2BB%2B4=12 ALIGN=MIDDLE  ALT=\"3%2BB%2B4=12\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=B%2B7=12 ALIGN=MIDDLE  ALT=\"B%2B7=12\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28B=5%29 ALIGN=MIDDLE  ALT=\"highlight%28B=5%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >----------and could have been done in one or two fewer steps. </SPAN>\n" );
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