document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=844017>Question 844017</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 1)Select the approximate values of x that are solutions to f(x) = 0, where <BR>\n" );
document.write( "f(x) = -9x2 + 4x + 7\r<BR>\n" );
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document.write( "2)Select the approximate values of x that are solutions to f(x) = 0, where<BR>\n" );
document.write( "f(x) = -2x2 + 3x + 9\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #508468 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=508468\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1)Select the approximate values of x that are solutions to f(x) = 0, where <BR>\n" );
document.write( "f(x) = -9x2 + 4x + 7 <BR>\n" );
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document.write( "-9x^2 + 4x + 7 = 0<BR>\n" );
document.write( "Use the Quadratic formula to get:<BR>\n" );
document.write( "x = [-4 +- sqrt(16-4*-9*7))/(2*-9)<BR>\n" );
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document.write( "x = [-4 +- sqrt(268))/(-18)<BR>\n" );
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document.write( "x  = [-4 +- 2sqrt(67))/-18<BR>\n" );
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document.write( "x [-2 +- sqrt(67))(-9)<BR>\n" );
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document.write( "2)Select the approximate values of x that are solutions to f(x) = 0, where<BR>\n" );
document.write( "f(x) = -2x2 + 3x + 9<BR>\n" );
document.write( "-2x^2 + 3x + 9 = 0<BR>\n" );
document.write( "-2x^2 -6x+3x + 9 = 0<BR>\n" );
document.write( "-2x(x+3)+3(x+3) = 0<BR>\n" );
document.write( "(x+3)(-2x+3) = 0<BR>\n" );
document.write( "x = -3 or x = 3/2<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "===================== <BR>\n" );
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