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If alpha,beta,gamma,sigma are the roots ...

If `alpha,beta,gamma,sigma` are the roots of the equation `x^4+4x^3-6x^2+7x-9=0,` then the value of `(1+alpha^2)(1+beta^2)(1+gamma^2)(1+sigma^2)` is a. `9` b. `11` c. `13` d. `5`

A

9

B

11

C

13

D

5

Text Solution

Verified by Experts

The correct Answer is:
C
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