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Roots of the quadratic equation (x^2-4x+...

Roots of the quadratic equation `(x^2-4x+3)+lamda(x^2-6x+8)=0,lamdainR` will be

A

always real

B

real only when`lamda` is positive

C

real only when `lamda` is negative

D

always imaginary

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The correct Answer is:
A
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