document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=552386>Question 552386</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In solving the equation (x + 4)(x – 7) = -24, Eric stated that the solution would be<BR>\n" );
document.write( "x + 4 = -24 => x = -28<BR>\n" );
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document.write( "(x – 7) = -24 => x = -17<BR>\n" );
document.write( "However, at least one of these solutions fails to work when substituted back into the original equation. Why is that? Please help Eric to understand better; solve the problem yourself, and explain your reasoning. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #360234 by </B><A HREF=/tutors/aboutme.mpl?userid=richard1234><B>richard1234(7193)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richard1234><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/cgi-bin/show-face.mpl?user=richard1234><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=360234\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Used \"zero-property rule\" incorrectly.\r<BR>\n" );
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document.write( "x^2 - 3x - 28 = -24\r<BR>\n" );
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document.write( "x^2 - 3x - 4 = 0\r<BR>\n" );
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document.write( "(x+1)(x-4) = 0\r<BR>\n" );
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document.write( "Now we use the zero-property rule.\r<BR>\n" );
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document.write( "x = -1 or x = 4 </SPAN>\n" );
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