Let alpha, beta be real roots of the qua...

Let `alpha, beta` be real roots of the quadratic equatin `x ^(2) +kx+ (k^(2) +2k -4)=0,` then the maximum value of `(alpha ^(2) +beta ^(2)) ` is equal to :

A

9

B

10

C

11

D

12

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The correct Answer is:

D

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