document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=86302>Question 86302</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need help with this question:  use synthetic division to complete the indicated factorization  x^3-37x+84=(x-4)( ) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #62402 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=62402\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let P be the unknown polynomial\r<BR>\n" );
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document.write( "Lets assume that <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x-4 ALIGN=MIDDLE  ALT=\"x-4\"   DISABLED_style= \"max-width:90%; height:auto;\" > is a factor\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E3-37x%2B84=%28x-4%29%28P%29 ALIGN=MIDDLE  ALT=\"x%5E3-37x%2B84=%28x-4%29%28P%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > Start with the given equation\r<BR>\n" );
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document.write( "Divide both sides by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x-4 ALIGN=MIDDLE  ALT=\"x-4\"   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=%28x%5E3-37x%2B84%29%2F%28x-4%29=P ALIGN=MIDDLE  ALT=\"%28x%5E3-37x%2B84%29%2F%28x-4%29=P\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Now lets divide <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x%5E3+-+37x+%2B+84%29%2F%28x-4%29 ALIGN=MIDDLE  ALT=\"%28x%5E3+-+37x+%2B+84%29%2F%28x-4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "First lets find our test zero:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x-4=0 ALIGN=MIDDLE  ALT=\"x-4=0\"   DISABLED_style= \"max-width:90%; height:auto;\" > Set the denominator <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x-4 ALIGN=MIDDLE  ALT=\"x-4\"   DISABLED_style= \"max-width:90%; height:auto;\" > equal to zero\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=4 ALIGN=MIDDLE  ALT=\"x=4\"   DISABLED_style= \"max-width:90%; height:auto;\" > Solve for x.\r<BR>\n" );
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document.write( "so our test zero is 4\r<BR>\n" );
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document.write( "Now set up the synthetic division table by placing the test zero in the upper left corner and placing the coefficients of the numerator to the right of the test zero.(note: remember if a polynomial goes from <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1x%5E3 ALIGN=MIDDLE  ALT=\"1x%5E3\"   DISABLED_style= \"max-width:90%; height:auto;\" > to <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-37x%5E1 ALIGN=MIDDLE  ALT=\"-37x%5E1\"   DISABLED_style= \"max-width:90%; height:auto;\" > there is a zero coefficient for <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2 ALIGN=MIDDLE  ALT=\"x%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >. This is simply because <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E3+-+37x+%2B+84 ALIGN=MIDDLE  ALT=\"x%5E3+-+37x+%2B+84\"   DISABLED_style= \"max-width:90%; height:auto;\" > really looks like <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1x%5E3%2B0x%5E2%2B-37x%5E1%2B84x%5E0 ALIGN=MIDDLE  ALT=\"1x%5E3%2B0x%5E2%2B-37x%5E1%2B84x%5E0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><TABLE  cellpadding=10>\n" );
document.write( "<TR><TD >4</TD><TD >|</TD><TD >1</TD><TD >0</TD><TD >-37</TD><TD >84</TD></TR><TR><TD ></TD><TD >|</TD><TD ></TD><TD ></TD><TD ></TD><TD ></TD><TD ></TD></TR><TR><TD ></TD><TD ></TD><TD ></TD><TD ></TD><TD ></TD><TD ></TD></TR>\n" );
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document.write( "Start by bringing down the leading coefficient (it is the coefficient with the highest exponent which is 1)\r<BR>\n" );
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document.write( "<TR><TD >4</TD><TD >|</TD><TD >1</TD><TD >0</TD><TD >-37</TD><TD >84</TD></TR><TR><TD ></TD><TD >|</TD><TD ></TD><TD ></TD><TD ></TD><TD ></TD><TD ></TD></TR><TR><TD ></TD><TD ></TD><TD >1</TD><TD ></TD><TD ></TD><TD ></TD></TR>\n" );
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document.write( "    Multiply 4 by 1 and place the product (which is 4)  right underneath the second  coefficient (which is 0)\r<BR>\n" );
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document.write( "<TR><TD >4</TD><TD >|</TD><TD >1</TD><TD >0</TD><TD >-37</TD><TD >84</TD></TR><TR><TD ></TD><TD >|</TD><TD ></TD><TD >4</TD><TD ></TD><TD ></TD><TD ></TD></TR><TR><TD ></TD><TD ></TD><TD >1</TD><TD ></TD><TD ></TD><TD ></TD></TR>\n" );
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document.write( "    Add 4 and 0 to get 4. Place the sum right underneath 4.\r<BR>\n" );
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document.write( "<TR><TD >4</TD><TD >|</TD><TD >1</TD><TD >0</TD><TD >-37</TD><TD >84</TD></TR><TR><TD ></TD><TD >|</TD><TD ></TD><TD >4</TD><TD ></TD><TD ></TD><TD ></TD></TR><TR><TD ></TD><TD ></TD><TD >1</TD><TD >4</TD><TD ></TD><TD ></TD></TR>\n" );
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document.write( "    Multiply 4 by 4 and place the product (which is 16)  right underneath the third  coefficient (which is -37)\r<BR>\n" );
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document.write( "<TR><TD >4</TD><TD >|</TD><TD >1</TD><TD >0</TD><TD >-37</TD><TD >84</TD></TR><TR><TD ></TD><TD >|</TD><TD ></TD><TD >4</TD><TD >16</TD><TD ></TD><TD ></TD></TR><TR><TD ></TD><TD ></TD><TD >1</TD><TD >4</TD><TD ></TD><TD ></TD></TR>\n" );
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document.write( "    Add 16 and -37 to get -21. Place the sum right underneath 16.\r<BR>\n" );
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document.write( "<TR><TD >4</TD><TD >|</TD><TD >1</TD><TD >0</TD><TD >-37</TD><TD >84</TD></TR><TR><TD ></TD><TD >|</TD><TD ></TD><TD >4</TD><TD >16</TD><TD ></TD><TD ></TD></TR><TR><TD ></TD><TD ></TD><TD >1</TD><TD >4</TD><TD >-21</TD><TD ></TD></TR>\n" );
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document.write( "    Multiply 4 by -21 and place the product (which is -84)  right underneath the fourth  coefficient (which is 84)\r<BR>\n" );
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document.write( "<TR><TD >4</TD><TD >|</TD><TD >1</TD><TD >0</TD><TD >-37</TD><TD >84</TD></TR><TR><TD ></TD><TD >|</TD><TD ></TD><TD >4</TD><TD >16</TD><TD >-84</TD><TD ></TD></TR><TR><TD ></TD><TD ></TD><TD >1</TD><TD >4</TD><TD >-21</TD><TD ></TD></TR>\n" );
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document.write( "    Add -84 and 84 to get 0. Place the sum right underneath -84.\r<BR>\n" );
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document.write( "    <TABLE  cellpadding=10>\n" );
document.write( "<TR><TD >4</TD><TD >|</TD><TD >1</TD><TD >0</TD><TD >-37</TD><TD >84</TD></TR><TR><TD ></TD><TD >|</TD><TD ></TD><TD >4</TD><TD >16</TD><TD >-84</TD><TD ></TD></TR><TR><TD ></TD><TD ></TD><TD >1</TD><TD >4</TD><TD >-21</TD><TD >0</TD></TR>\n" );
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document.write( "Since the last column adds to zero, we have a remainder of zero. This means <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x-4 ALIGN=MIDDLE  ALT=\"x-4\"   DISABLED_style= \"max-width:90%; height:auto;\" > is a factor of  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E3+-+37x+%2B+84 ALIGN=MIDDLE  ALT=\"x%5E3+-+37x+%2B+84\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Now lets look at the bottom row of coefficients:\r<BR>\n" );
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document.write( "The first 3 coefficients (1,4,-21) form the quotient\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2+%2B+4x+-+21 ALIGN=MIDDLE  ALT=\"x%5E2+%2B+4x+-+21\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "So <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x%5E3+-+37x+%2B+84%29%2F%28x-4%29=x%5E2+%2B+4x+-+21 ALIGN=MIDDLE  ALT=\"%28x%5E3+-+37x+%2B+84%29%2F%28x-4%29=x%5E2+%2B+4x+-+21\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "So the unknown polynomial P is \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=P=x%5E2+%2B+4x+-+21 ALIGN=MIDDLE  ALT=\"P=x%5E2+%2B+4x+-+21\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Now multiply both sides by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x-4 ALIGN=MIDDLE  ALT=\"x-4\"   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=cross%28x-4%29%28x%5E3+-+37x+%2B+84%29%2Fcross%28x-4%29=%28x%5E2+%2B+4x+-+21%29%28x-4%29 ALIGN=MIDDLE  ALT=\"cross%28x-4%29%28x%5E3+-+37x+%2B+84%29%2Fcross%28x-4%29=%28x%5E2+%2B+4x+-+21%29%28x-4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "So the expression factors to this\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E3+-+37x+%2B+84=%28x%5E2+%2B+4x+-+21%29%28x-4%29 ALIGN=MIDDLE  ALT=\"x%5E3+-+37x+%2B+84=%28x%5E2+%2B+4x+-+21%29%28x-4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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