document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=52431>Question 52431</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0321279085/algebrahomeworkh>College Algebra</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Using the quadratic equation x2 - 4x - 5 = 0, perform the following tasks:<BR>\n" );
document.write( "a) 	Solve by factoring.	<BR>\n" );
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document.write( "b) 	Solve by completing the square.<BR>\n" );
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document.write( "c) 	Solve by using the quadratic formula. <BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #34977 by </B><A HREF=/tutors/aboutme.mpl?userid=funmath><B>funmath(2933)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=funmath><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=34977\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x^2-4x-5=0<BR>\n" );
document.write( "Factoring:  Two numbers that multiply together to give you -5 but add together to give you -4 are -5 and +1.<BR>\n" );
document.write( "(x-5)(x+1)=0<BR>\n" );
document.write( "x-5=0<BR>\n" );
document.write( "x-5+5=0+5<BR>\n" );
document.write( "x=5<BR>\n" );
document.write( "x+1=0<BR>\n" );
document.write( "x+1-1=0-1<BR>\n" );
document.write( "x=-1<BR>\n" );
document.write( "x=-1 and x=5<BR>\n" );
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document.write( "Complteting the square:<BR>\n" );
document.write( "x^2-4x-5=0<BR>\n" );
document.write( "x^2-4x-5+5=0+5<BR>\n" );
document.write( "x^2-4x=5<BR>\n" );
document.write( "x^2-4x+(-4/2)^2=5+(-4/2)^2<BR>\n" );
document.write( "x^2-4x+(-2)^2=5+(-2)^2<BR>\n" );
document.write( "x^2-4x+4=5+4<BR>\n" );
document.write( "(x-2)^2=9<BR>\n" );
document.write( "sqrt((x-2)^2)=(+or-)sqrt(9)<BR>\n" );
document.write( "x-2=(+or-)3<BR>\n" );
document.write( "x-2+2=+2(+or-)3<BR>\n" );
document.write( "x=2(+or-)3<BR>\n" );
document.write( "x=2-3=-1<BR>\n" );
document.write( "x=2+3=5<BR>\n" );
document.write( "x=-1 and x=5<BR>\n" );
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document.write( "x^2-4x-5=0<BR>\n" );
document.write( "a=1;b=-4;c=-5<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=%28-b%2B-sqrt%28b%5E2-4%2Aa%2Ac%29%29%2F%282%2Aa%29 ALIGN=MIDDLE  ALT=\"x=%28-b%2B-sqrt%28b%5E2-4%2Aa%2Ac%29%29%2F%282%2Aa%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "x=(-(-4)+or-sqrt((-4)^2-4*(1)*(-5))/(2*1)<BR>\n" );
document.write( "x=(4+or-sqrt(16+20))/2<BR>\n" );
document.write( "x=(4+or-sqrt(36))/2<BR>\n" );
document.write( "x=(4+or-6)/2<BR>\n" );
document.write( "x=(4-6)/2<BR>\n" );
document.write( "x=(-2)/2<BR>\n" );
document.write( "x=-1<BR>\n" );
document.write( "x=(4+6)/2<BR>\n" );
document.write( "x=10/2<BR>\n" );
document.write( "x=5<BR>\n" );
document.write( "x=-1 and x=5 </SPAN>\n" );
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