document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=838873>Question 838873</A>: <I><SPAN STYLE=\"word-break: break-all;\"> how do I solve k^2-4k-5=0 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #505408 by </B><A HREF=/tutors/aboutme.mpl?userid=mxgirl22><B>mxgirl22(39)</B></A><img src=\"/images/stars/stars-07.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mxgirl22><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=mxgirl22><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=505408\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> how do I solve k^2-4k-5=0\r<BR>\n" );
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document.write( "1.) You can either factor or use the quadratic formula.\r<BR>\n" );
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document.write( "For this step I'll show you factoring since this is a nice trinomial.\r<BR>\n" );
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document.write( "k^2-4k-5=0\r<BR>\n" );
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document.write( "We need to find two numbers that will give us -5 when multiplied together and -4 when added together.\r<BR>\n" );
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document.write( "I like to set it up like this when I'm solving...\r<BR>\n" );
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document.write( "[_]+[_]=-4<BR>\n" );
document.write( "[_]x[_]=-5\r<BR>\n" );
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document.write( "I know the only way to get -5 when multiplying is by having 1 & -5(or -1 and 5) but looking at what it needs to add up to it has to be 1 and -5.\r<BR>\n" );
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document.write( "[1]+[-5]=-4<BR>\n" );
document.write( "[1]x[-5]=-5\r<BR>\n" );
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document.write( "Now use those numbers to factor.\r<BR>\n" );
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document.write( "k^2-4k-5=0\r<BR>\n" );
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document.write( "k^2+1k-5k-5=0\r<BR>\n" );
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document.write( "(k^2+1k)+(-5k-5)=0\r<BR>\n" );
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document.write( "k(k+1)-5(k+1)=0\r<BR>\n" );
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document.write( "k-5=0___&___k+1=0\r<BR>\n" );
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document.write( "k-5+5=0+5_&_k+1-1=0-1\r<BR>\n" );
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document.write( "k=5_____&___k=-1\r<BR>\n" );
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document.write( "2.) If you wanted to use the **Quadratic Formula**, this is the step to look at:\r<BR>\n" );
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document.write( "k^2-4k-5=0\r<BR>\n" );
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document.write( "a=1, b=-4, c=-5\r<BR>\n" );
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document.write( "Quadratic Formula:\r<BR>\n" );
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document.write( "Solve for <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+%284+%2B+6+%29%2F%282%29+ ALIGN=MIDDLE  ALT=\"x+=+%284+%2B+6+%29%2F%282%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "and\r<BR>\n" );
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document.write( "Solve for <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+%284+-+6+%29%2F%282%29+ ALIGN=MIDDLE  ALT=\"x+=+%284+-+6+%29%2F%282%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "---------------------\r<BR>\n" );
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