document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=141309>Question 141309</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Which method is best used to find the solutions to:\r<BR>\n" );
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document.write( "k(w) = -w^2 + 4\r<BR>\n" );
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document.write( "a.  Using the square root property<BR>\n" );
document.write( "b.  Completing the square<BR>\n" );
document.write( "c.  Using the quadratic formula<BR>\n" );
document.write( "d.  This cannot be solved since the variable is not 'x'\r<BR>\n" );
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document.write( "I selected D; because a,b,c all require a 'x' variable </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #102952 by </B><A HREF=/tutors/aboutme.mpl?userid=vleith><B>vleith(2983)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=vleith><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=102952\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> It is a common misconception to think that every function must be expressed in terms of y and x. That is NOT so. You can use any 'variables' to represent unknowns. It doesn't have to be x and y, it doesn't even have to be letters. You would use symbols if you wanted to.\r<BR>\n" );
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document.write( "So D is not correct.<BR>\n" );
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document.write( "The given equation is the sum of two perfect squares. Sums of two squares cannot be factored. Completing the square is not appropriate for this one. <BR>\n" );
document.write( "To find the solutions, set k(w) to 0 and solve. a is the simplest way to do that. c would work too.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0+=+-w%5E2+%2B+4 ALIGN=MIDDLE  ALT=\"0+=+-w%5E2+%2B+4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-4+=+-w%5E2 ALIGN=MIDDLE  ALT=\"-4+=+-w%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4+=+w%5E2 ALIGN=MIDDLE  ALT=\"4+=+w%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "-+2 = w </SPAN>\n" );
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