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Mathematics 8 Online
OpenStudy (anonymous):

Calculate the discriminant X^2-x-2=0

jimthompson5910 (jim_thompson5910):

the discriminant of ax^2 + bx + c is D = b^2 - 4ac

jimthompson5910 (jim_thompson5910):

in your case, a = 1 b = -1 c = -2

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