document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=115795>Question 115795</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need help factoring these polynomials completely.\r<BR>\n" );
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document.write( "20x squared - 7x - 6\r<BR>\n" );
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document.write( "ab - a - b + 1\r<BR>\n" );
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document.write( "and -8z squared + 48z - 72 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #84243 by </B><A HREF=/tutors/aboutme.mpl?userid=edjones><B>edjones(8007)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=edjones><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=edjones><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=84243\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 20x^2 - 7x - 6<BR>\n" );
document.write( "20*-6=-120 multiply 1st and last coefficients.<BR>\n" );
document.write( "find 2 factors of -120 whose sum is -7. Ans: -15, +8 The rest is easy.<BR>\n" );
document.write( "(20x^2-15x)+(8x-6) factoring by grouping.<BR>\n" );
document.write( "5x(4x-3)+2(4x-3)<BR>\n" );
document.write( "(5x+2)(4x-3) It works every time!<BR>\n" );
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document.write( "-8z^2 + 48z - 72<BR>\n" );
document.write( "-8*-72=576 Wow, this is humongous. <BR>\n" );
document.write( "Find the 2 factors of 576 that add up to 48. Ans 24, 24 It took a while.<BR>\n" );
document.write( "(-8z^2+24z)+(24z-72)<BR>\n" );
document.write( "-8z(z-3)+24(z-3)<BR>\n" );
document.write( "(-8z+24)(z-3)<BR>\n" );
document.write( "-(8z-24)(z-3)<BR>\n" );
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document.write( "ab - a - b + 1 This one is so easy that I know you are chomping at the bit to do it yourself.<BR>\n" );
document.write( "a(b-1)-(b-1) factoring by grouping again.<BR>\n" );
document.write( "(a-1)(b-1)<BR>\n" );
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document.write( "Ed\r<BR>\n" );
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