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January 9th, 2013, 12:44 PM  #1 
Newbie Joined: Jan 2013 Posts: 2 Thanks: 0  simplify equation to get a quadratic equation
Hi, I'm doing some revision an I have the solution to the question however some steps are missing which is the problem. The two following steps are all I have and I'm stuck trying to solve it: if I have the equation: 0.049 = 0.051 (57.46 / (25.34y + 27.87 +5.76y^2)) how do I come up with the quadratic of 0.28y^2 + 1.24y  1.56 = 0 Any help would be really appreciated! Thanks Michael 
January 9th, 2013, 01:06 PM  #2 
Global Moderator Joined: Oct 2008 From: London, Ontario, Canada  The Forest City Posts: 7,814 Thanks: 1046 Math Focus: Elementary mathematics and beyond  Re: simplify equation to get a quadratic equation
0.049 = 0.051 * 57.46/(5.76y² + 25.34y + 27.87) 49/51 = 57.46/(5.76y² + 25.34y + 27.87) 49(5.76y² + 25.34y + 27.87) = 2930.46 282.24y² + 1241.66y + 1365.63 = 2930.46 282.24y² + 1241.66y  1564.83 = 0. Divide by 1000 and round to two decimal places: 0.28y² + 1.24y  1.56 = 0 
January 9th, 2013, 01:19 PM  #3 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 12,619 Thanks: 845  Re: simplify equation to get a quadratic equation
If you don't end up with y = ~1.0226 or y = ~5.4219 then try again!!

January 9th, 2013, 01:22 PM  #4 
Newbie Joined: Jan 2013 Posts: 2 Thanks: 0  Re: simplify equation to get a quadratic equation
That's great thanks!


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equation, quadratic, simplify 
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