document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=397982>Question 397982</A>: <I><SPAN STYLE=\"word-break: break-all;\"> can you please explain how you work these out. i would be gratful if you show your working out clearly so that i understand it.\r<BR>\n" );
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document.write( "2) multiply and simplify :\r<BR>\n" );
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document.write( "x(2x+8)-x(x-3)\r<BR>\n" );
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document.write( "2&#960;(R^2 -r ^2)\r<BR>\n" );
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document.write( "factorise common factor:\r<BR>\n" );
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document.write( "20x - 35<BR>\n" );
document.write( "2x^2 +6 <BR>\n" );
document.write( "12y^2 - 4YX+20x^2Y<BR>\n" );
document.write( "2&#960;rh + 2&#960;r^2\r<BR>\n" );
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document.write( "solve the follwoing equations\r<BR>\n" );
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document.write( "2(x-1)=3<BR>\n" );
document.write( "7r+2=5(r-4)\r<BR>\n" );
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document.write( "Solve simultaneous equations algebraically and draw a graph.\r<BR>\n" );
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document.write( "a)Y = 2x<BR>\n" );
document.write( "Y= x + 5\r<BR>\n" );
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document.write( "b)3x + y = 13<BR>\n" );
document.write( "2x – 3y = 6\r<BR>\n" );
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document.write( "c)2x + 3y = 7<BR>\n" );
document.write( "3x – 2y = 17\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 #281993 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=281993\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> multiply and simplify : <BR>\n" );
document.write( "x(2x+8)-x(x-3)<BR>\n" );
document.write( "= 2x^2+8x-x^2+3<BR>\n" );
document.write( "= x^2+8x+3<BR>\n" );
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document.write( "2&#960;(R^2 -r ^2)<BR>\n" );
document.write( "= 2(pi)(R-r)(R+r)<BR>\n" );
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document.write( "Factorise common factor: <BR>\n" );
document.write( "20x - 35 = 5(4x-7)<BR>\n" );
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document.write( "2x^2 +6 = 2(x^2+3)<BR>\n" );
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document.write( "12y^2 - 4YX+20x^2Y<BR>\n" );
document.write( "= 4(3y^2-xy+5x^2)<BR>\n" );
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document.write( "2&#960;rh + 2&#960;r^2 = 2(pi)r(h+r)<BR>\n" );
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document.write( "solve the following equations <BR>\n" );
document.write( "2(x-1)=3<BR>\n" );
document.write( "(x-1) = 3/2<BR>\n" );
document.write( "x = 1+(3/2)<BR>\n" );
document.write( "x = 5/2<BR>\n" );
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document.write( "7r+2=5(r-4)<BR>\n" );
document.write( "7r+2 = 5r-20<BR>\n" );
document.write( "2r = -22<BR>\n" );
document.write( "r = -11<BR>\n" );
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document.write( "Solve simultaneous equations algebraically and draw a graph. <BR>\n" );
document.write( "a)Y = 2x<BR>\n" );
document.write( "Y= x + 5<BR>\n" );
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document.write( "Substitute for y and solve for \"x\":<BR>\n" );
document.write( "2x = x + 5<BR>\n" );
document.write( "x = 5<BR>\n" );
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document.write( "Then y = 2x = 2*5 = 10<BR>\n" );
document.write( "Solution (5,10)<BR>\n" );
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document.write( "b)3x + y = 13<BR>\n" );
document.write( "2x – 3y = 6<BR>\n" );
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document.write( "Multiply thru the 1st equation by 3 to get:<BR>\n" );
document.write( "9x+3y = 39<BR>\n" );
document.write( "2x-3y = 6<BR>\n" );
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document.write( "Add and solve for \"x\":<BR>\n" );
document.write( "11x = 45<BR>\n" );
document.write( "x = 45/11<BR>\n" );
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document.write( "Solve for \"y\":<BR>\n" );
document.write( "3x + y = 13<BR>\n" );
document.write( "3(35/11) + y = 13<BR>\n" );
document.write( "(105/11) + y = (13*11/11)<BR>\n" );
document.write( "y = 38/11<BR>\n" );
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document.write( "c)2x + 3y = 7<BR>\n" );
document.write( "3x – 2y = 17<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Multiply thru 1st by 3.<BR>\n" );
document.write( "Multiply thru 2nd by 2.<BR>\n" );
document.write( "---<BR>\n" );
document.write( "6x + 9y = 21<BR>\n" );
document.write( "6x - 4y = 34<BR>\n" );
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document.write( "Subtract and solve for \"y\":<BR>\n" );
document.write( "-13y = 13<BR>\n" );
document.write( "y = -1<BR>\n" );
document.write( "---<BR>\n" );
document.write( "Solve for \"x\":<BR>\n" );
document.write( "2x+3y = 7<BR>\n" );
document.write( "2x+3(-1) = 7<BR>\n" );
document.write( "2x = 10<BR>\n" );
document.write( "x = 5<BR>\n" );
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document.write( "====================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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