My Math Forum simplify equation to get a quadratic equation

 Algebra Pre-Algebra and Basic Algebra Math Forum

 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: 7,854 Thanks: 1078 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: 13,112 Thanks: 912 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!

 Thread Tools Display Modes Linear Mode

 Similar Threads Thread Thread Starter Forum Replies Last Post linhbui Elementary Math 1 November 11th, 2013 08:04 PM JulieK Differential Equations 1 December 29th, 2012 09:25 AM nubshat Trigonometry 4 October 6th, 2012 11:13 AM pjlloyd Algebra 1 October 26th, 2011 02:50 PM sharp Algebra 2 December 27th, 2010 04:41 PM

 Contact - Home - Forums - Cryptocurrency Forum - Top