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June 18th, 2012, 06:30 AM  #1 
Senior Member Joined: Sep 2011 Posts: 395 Thanks: 0  Sum & Product of the Roots of a Quadratic Equation
Having a bit of trouble with this one. can anyone help? Many thanks. Q. Find the value of p, if 1 root of the equation is 2 greater than the other root. Attempt: Sum of Roots: => => => => ...(i) Product of Roots: => => => => ...(ii) From (i): => From (ii): => => => => Ans.: (From text book): 
June 18th, 2012, 07:37 AM  #2 
Global Moderator Joined: Oct 2008 From: London, Ontario, Canada  The Forest City Posts: 7,659 Thanks: 964 Math Focus: Elementary mathematics and beyond  Re: Sum & Product of the Roots of a Quadratic Equation 
June 18th, 2012, 07:41 AM  #3  
Math Team Joined: Dec 2006 From: Lexington, MA Posts: 3,267 Thanks: 407  Re: Sum & Product of the Roots of a Quadratic Equation Hello, bilano99! Quote:  
June 18th, 2012, 08:02 AM  #4 
Senior Member Joined: Sep 2011 Posts: 395 Thanks: 0  Re: Sum & Product of the Roots of a Quadratic Equation
Ah! I see what I did. Thanks, guys.

June 18th, 2012, 10:26 AM  #5 
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,155 Thanks: 463 Math Focus: Calculus/ODEs  Re: Sum & Product of the Roots of a Quadratic Equation
Another approach: The difference between the two roots is 2: 

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