document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=420850>Question 420850</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi, I'm having issues understanding a quadratic equation that was given to me as an example. I do not under stand the second line and how they got to it. Could someone please explain it or show the steps that were taken to get there.\r<BR>\n" );
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document.write( "The equation is d^2-7d+9=0.  Here are the steps I was given.\r<BR>\n" );
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document.write( "d^=7d-9<BR>\n" );
document.write( "d^2-7d+9=0<BR>\n" );
document.write( "d=(7+_ Square root of 49-4(9)) divided by 2<BR>\n" );
document.write( "d=(7+_squareroot of 49-36)/2<BR>\n" );
document.write( "d= (7+- squareroot of 13) /2\r<BR>\n" );
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document.write( "Now I can see how  step 1 to 2 is done that is simple and I can see how it goes from step 4 to the answer but I can not understand  how to go from step 2 to step 3.\r<BR>\n" );
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document.write( "I have tried it myself. here is what I keep getting.<BR>\n" );
document.write( "d^2=7d-9<BR>\n" );
document.write( "d^2-7d+9=0<BR>\n" );
document.write( "d(d-7)+9=0<BR>\n" );
document.write( "d(d-7)=-9<BR>\n" );
document.write( "d-7=-9/d<BR>\n" );
document.write( "d=-9/d+7<BR>\n" );
document.write( "2d=-9+7<BR>\n" );
document.write( "2d=-2<BR>\n" );
document.write( "d=-1\r<BR>\n" );
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document.write( "I know my answer is incorrect, Please Help me </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #293956 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=293956\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The equation is d^2-7d+9=\r<BR>\n" );
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document.write( "add -9 to both sides\r<BR>\n" );
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document.write( "d^2-7d+9-9 =-9<BR>\n" );
document.write( "we get d^2-7 = -9\r<BR>\n" );
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document.write( "Add a third term on the left side such that it becomes a perfect square. The same term you add on the right side\r<BR>\n" );
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document.write( "d^2-7d+49/4 = -9 +(49/4)\r<BR>\n" );
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document.write( "(d-7/2)^2= -9+(49/4)( take the LCD )\r<BR>\n" );
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document.write( "(d-7/2)^2=(-36+49)/4<BR>\n" );
document.write( "(d-7/2)^2=13/4\r<BR>\n" );
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document.write( "Take the square root on both sides<BR>\n" );
document.write( "d-7/2= +/- sqrt(13)/sqrt(4)\r<BR>\n" );
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document.write( "d1= 7/2+sqrt(13)/2<BR>\n" );
document.write( "d=5.03\r<BR>\n" );
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document.write( "OR<BR>\n" );
document.write( "d2= 7/2-sqrt(13)/2<BR>\n" );
document.write( "1.697 \r<BR>\n" );
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document.write( " </SPAN>\n" );
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