Question 166538
What is the sum of the roots of the equation 
ax^2+bx+c=0
Roots: x = [-b + sqrt(b^2-4ac)]2a or x = [-b -sqrt(b^2-4ac)]/2a

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Adding you get [-b/2a] + [-b/2a]

= 2[-b/2a]

= -b/a
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Cheers,
Stan H.