document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=65032>Question 65032</A>: <I><SPAN STYLE=\"word-break: break-all;\"> please help \r<BR>\n" );
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document.write( "factor each trinomial \r<BR>\n" );
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document.write( "49z^2-42z+9 the answer is (7z-3)^2 how in the world do they come up with that? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #45553 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=45553\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 49z^2-42z+9 the answer is (7z-3)^2 how in the world do they come up with that?<BR>\n" );
document.write( "49z^2-42a+9 is a perfect trinomial square<BR>\n" );
document.write( "The 1st and 3rd terms are perfect squares<BR>\n" );
document.write( "The 2nd term is -2 times the product of the square roots of the 1st and 3rd terms.<BR>\n" );
document.write( "The factors are:<BR>\n" );
document.write( "(7z-3)(7z-3) or (7z-3)^2<BR>\n" );
document.write( "To see that this is true use FOIL to multiply (7z-3)(7z-3)<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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