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kotesh marikala Grade: 12
        

if the roots of the equation x2-ax+b=0 are real and differ by a quantityb less than unity prove that a2-1/4

7 years ago

Answers : (1)

vikas askiitian expert
510 Points
										

x2 - ax + b = 0

if roots of the eq are (A,B) then

A+B = a , AB = b

A-B = difference of roots = [(A+B)2 - 4AB]1/2

A-B = [ a2 - 4b ]1/2

A-B = b               (given)

s0 , b = [ a2 - 4b ]1/2

 a2 - b2 - 4b = 0

 

approve my ans if u like

7 years ago
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