document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=315996>Question 315996</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a student is trying to solve the equation (x + 10)(x - 10)=7. The student has set x + 7 and x - 10 = 7 and found that two solutions x=3, x=17. The student checks the results by plugging inthe solutions into the original equation and finds they do not work. How would you advise the student? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #226043 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley77><B>checkley77(12844)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley77><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=226043\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (x + 10)(x - 10)=7 EXPAND THE LEFT HAND TERMS.<BR>\n" );
document.write( "X^2-100=7 COMBINE LIKE TERMS.<BR>\n" );
document.write( "X^2-100+7=0<BR>\n" );
document.write( "X^2-97=0<BR>\n" );
document.write( "X^2=97<BR>\n" );
document.write( "X=SQRT97<BR>\n" );
document.write( "X=+-9.85 ANS. </SPAN>\n" );
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