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Chapter 4 : Algebra http://www.datprep.com/forum/goldstandarddatqr/chapter4algebrat609.html 
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Author:  admin [ Fri Mar 28, 2014 3:28 pm ] 
Post subject:  Chapter 4 : Algebra 
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Author:  jfu.green [ Sun Aug 18, 2019 5:17 pm ]  
Post subject:  Re: Chapter 4 : Algebra  
Can someone please explain to me how was one able to come to the conclusion that B is the correct answer? Also, how did they get 12y and 109? Thanks!

Author:  sr_vineeth_ruveneco [ Mon Aug 26, 2019 10:18 pm ] 
Post subject:  Re: Chapter 4 : Algebra 
Hi jfu.green, Here is a stepbystep process in solving the equation: y = 3x^2  5x  7 Step 1: multiply both sides by 12 12y = 36x^2  60x  84 Step 2: add 109 to both sides so that the term on the right can be factored 12y + 109 = 36x^2 60x +25 Step 3: Factor the right side 12y + 109 = (6x  5)^2 Step 4: square root both sides sqrt (12y + 109) = 6x  5 Step 5: add 5 to both sides 5 + sqrt (12y + 109) = 6x Step 6: divide both sides by 6 5 + sqrt (12y + 109) / 6 = x Hope this helps! 
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