document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1030479>Question 1030479</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I left my notes at school.  I don't know how to solve this problem\r<BR>\n" );
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document.write( "(3x+5)(7x-15)=180 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #645350 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=645350\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (3x+5)(7x-15)=180\r<BR>\n" );
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document.write( "3x(7x-15)+5(7x-15)=180\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=21x%5E2+-45x%2B35x-75=180 ALIGN=MIDDLE  ALT=\"21x%5E2+-45x%2B35x-75=180\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "21x^2-10x-255=0\r<BR>\n" );
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document.write( "Find the roots of the equation by quadratic formula							<BR>\n" );
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document.write( "a=	21	b=	-10	c=	-255		<BR>\n" );
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document.write( "b^2-4ac=	100	-	-21420				<BR>\n" );
document.write( "b^2-4ac=	21520			<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%28%0921520%09%29 ALIGN=MIDDLE  ALT=\"sqrt%28%0921520%09%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >=	146.7<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F%282a%29 ALIGN=MIDDLE  ALT=\"x=%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F%282a%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >							<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x1=%28-b%2Bsqrt%28b%5E2-4ac%29%29%2F%282a%29 ALIGN=MIDDLE  ALT=\"x1=%28-b%2Bsqrt%28b%5E2-4ac%29%29%2F%282a%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >							<BR>\n" );
document.write( "x1=(	10	+	146.7	)/	42		<BR>\n" );
document.write( "x1=	3.73						<BR>\n" );
document.write( "x2=(	10	-146.7	) /	42			<BR>\n" );
document.write( "x2=	-3.25						<BR>\n" );
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document.write( "x	=	3.73 or -3.25					\r<BR>\n" );
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