16 August 2023

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17 March 2020

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6 August 2016

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5 July 2013

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15 May 2012

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• curprev 15:1515:15, 15 May 2012 1=2 talk contribs 1,140 bytes +1,140 Created page with "== Problem == If <math>r</math> and <math>s</math> are the roots of the equation <math>ax^2+bx+c=0</math>, the value of <math> \frac{1}{r^{2}}+\frac{1}{s^{2}} </math> is: <math>..."