document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=38398>Question 38398</A>: <I><SPAN STYLE=\"word-break: break-all;\"> x SQUARED(2) + 7 = 21 CAN YOU HELP ME SOLVE THIS EQUATION? ALSO COULD YOU EXPLAIN HOW YOU WOULD KNOW IF YOU SUBTRACT, DIVIDE OR ADD TO THE OTHER SIDE? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #23887 by </B><A HREF=/tutors/aboutme.mpl?userid=fractalier><B>fractalier(6550)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=fractalier><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=fractalier><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=23887\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The general idea is to isolate x on one side of the equation and put everything else on the other side...to do that, you normally try to UNDO what is being done to x...so in this problem<BR>\n" );
document.write( "x^2 + 7 = 21<BR>\n" );
document.write( "you want to undo the +7 by subtracting 7 from both sides first, giving us<BR>\n" );
document.write( "x^2 = 14<BR>\n" );
document.write( "now you want to take the square root of both sides.  This undoes the squaring of x, and we get<BR>\n" );
document.write( "x = ± sqrt(14)<BR>\n" );
document.write( "Two answers, a plus and a minus square root of 14. </SPAN>\n" );
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