document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=12589>Question 12589</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi <BR>\n" );
document.write( "I'm having trouble with the following questions, i would be grateful if you could help me out, they are questions that i came across while revising for a test i've tried my hardest to solve them but i cant work it out (Can you please provide me with thier answers, i think i can figure them out if i have an answer to work from.)<BR>\n" );
document.write( "The questions are:\r<BR>\n" );
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document.write( "1.What is the axis of symmetry for the following parabola?<BR>\n" );
document.write( "y = x² + 4x\r<BR>\n" );
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document.write( "2.What is the axis of symmetry for the following parabola?<BR>\n" );
document.write( "y = x(4 - x)\r<BR>\n" );
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document.write( "3.What is the vertex of the following parabola?<BR>\n" );
document.write( "y = 4x² - 8\r<BR>\n" );
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document.write( "4.Factorise the following quadratic expression<BR>\n" );
document.write( "2x² - 3x - 2\r<BR>\n" );
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document.write( "I've tried but i cant solve those answers\r<BR>\n" );
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document.write( "Thnkyou very much<BR>\n" );
document.write( "Yours sincerly<BR>\n" );
document.write( "Vinny<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #6382 by </B><A HREF=/tutors/aboutme.mpl?userid=Earlsdon><B>Earlsdon(6294)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Earlsdon><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=6382\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1) The axis of symmetry is given by:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+-b%2F2a ALIGN=MIDDLE  ALT=\"x+=+-b%2F2a\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+%28-4%29%2F2 ALIGN=MIDDLE  ALT=\"x+=+%28-4%29%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+-2 ALIGN=MIDDLE  ALT=\"x+=+-2\"   DISABLED_style= \"max-width:90%; height:auto;\" > This is the axis of symmetry.\r<BR>\n" );
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document.write( "2)<BR>\n" );
document.write( " <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+x%284-x%29 ALIGN=MIDDLE  ALT=\"y+=+x%284-x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+-x%5E2+%2B+4x ALIGN=MIDDLE  ALT=\"y+=+-x%5E2+%2B+4x\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "The axis of symmetry:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+%28-4%29%2F-2 ALIGN=MIDDLE  ALT=\"x+=+%28-4%29%2F-2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+2 ALIGN=MIDDLE  ALT=\"x+=+2\"   DISABLED_style= \"max-width:90%; height:auto;\" > This is the axis of symmetry.\r<BR>\n" );
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document.write( "3) The x-coordinate of the vertex is given by:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+-b%2F2a ALIGN=MIDDLE  ALT=\"x+=+-b%2F2a\"   DISABLED_style= \"max-width:90%; height:auto;\" > The same as the axis of symmetry.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+0%2F2%284%29 ALIGN=MIDDLE  ALT=\"x+=+0%2F2%284%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > The coefficient of the x-term (that's b)is 0.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+0 ALIGN=MIDDLE  ALT=\"x+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The y-coordinate is found by substituting x = 0 into the quadratic equation and solving for y.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+4%280%29%5E2+-+8 ALIGN=MIDDLE  ALT=\"y+=+4%280%29%5E2+-+8\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+-8 ALIGN=MIDDLE  ALT=\"y+=+-8\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "The vertex is at: (0, -8)\r<BR>\n" );
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document.write( "4) Factorise (UK?): <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2x%5E2+-+3x+-+2 ALIGN=MIDDLE  ALT=\"2x%5E2+-+3x+-+2\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%282x+%2B+1%29%28x+-+2%29 ALIGN=MIDDLE  ALT=\"%282x+%2B+1%29%28x+-+2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );