document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=51203>Question 51203</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0073016020/algebrahomeworkh>Beginning Algebra</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Can someone solve this problem for me?\r<BR>\n" );
document.write( "\n" );
document.write( "solve by using quadratic formula\r<BR>\n" );
document.write( "\n" );
document.write( "x^2-4x-60=0 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #34169 by </B><A HREF=/tutors/aboutme.mpl?userid=mathchemprofessor><B>mathchemprofessor(65)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mathchemprofessor><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=34169\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x^2-4x-60=0<BR>\n" );
document.write( "This is of the form,<BR>\n" );
document.write( "ax^2+bx+c=0<BR>\n" );
document.write( "Comparing the above two equations,<BR>\n" );
document.write( "a=1,b=-4, c=-60<BR>\n" );
document.write( "Quadradic formula:<BR>\n" );
document.write( "x =(-b+sqrt(b^2-4ac))/2a<BR>\n" );
document.write( "Substituting the values of a,b and c, from the given equation,<BR>\n" );
document.write( "x=(-(-4) ħsqrt(-4)^2-4(1)(-60))/2*1<BR>\n" );
document.write( "=( 4ħsqrt(16+240))/2*1<BR>\n" );
document.write( "= (4ħsqrt256)/2<BR>\n" );
document.write( "= (4ħ16)/2<BR>\n" );
document.write( "So, x= (4+16)/2 or x = (4-16)/2<BR>\n" );
document.write( "      x=20/2=10 or x= -12/2=-6\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );