document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=221521>Question 221521</A>: <I><SPAN STYLE=\"word-break: break-all;\"> ive tried this plenty of times i get stuck because i know how to solve the problom when there are two vairibles but not three please helpp! i have a test on this tommorow\r<BR>\n" );
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document.write( "the question on my worksheet is write a quadratic function in standard form whose graph passes through the given points:\r<BR>\n" );
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document.write( "(1,-2),(-2,1),(3,6) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #166140 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=166140\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> write a quadratic function in standard form whose graph passes through the given points: <BR>\n" );
document.write( "(1,-2),(-2,1),(3,6)<BR>\n" );
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document.write( "Form: ax^2 + bx + c = y<BR>\n" );
document.write( "Substitute each point for the x and the y values<BR>\n" );
document.write( "to get 3 equations. Then solve the system for a,b,c.<BR>\n" );
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document.write( "Using(1,-2) you get: a + b + c = -2<BR>\n" );
document.write( "Using(-2,1) you get:4a -2b + c = 1<BR>\n" );
document.write( "Using(3,6) you get:9x^2+3b + c = 6<BR>\n" );
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document.write( "Solve by any method you know to get:<BR>\n" );
document.write( "a = 1<BR>\n" );
document.write( "b = 0<BR>\n" );
document.write( "c = -3<BR>\n" );
document.write( "===============<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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