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If a,b,c are the roots of the eq. x³-12x²+39x-21=0Then find value of determinanta.b-c.c+d.a+c.b.c-a.a-b.b+a.c.

Bulbul , 7 Years ago
Grade 12
anser 1 Answers
Dinesh Nayak

Last Activity: 7 Years ago

on solving the diterminant we get the equation as 
                       a3+b3+c3+a2(b + c)+b2(a+c)+c2(a+b)
on solving the cubic equation we get the roots as
 x \approx 0.67
 x \approx  4.84
 x \approx 6.49
so these are the values for a,b,c
on substituting the values for a,b,c we get the value as = 791.93
 

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