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If the roots of the equationx³ - 12 x²+ 39 X - 28 =0 are in AP the common differences is

If the roots of the equationx³ - 12 x²+ 39 X - 28 =0 are in AP the common differences is

Grade:11

1 Answers

AKSHANSH PAREEK
68 Points
5 years ago
if roots of equation sre in AP then use difference of roots  formula
i.e.  D1/2/a     D=discriminant
                     a=12
 
let  roots be d and f 
 
(392+4*12*28)1/2/12 = answere
 
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