Question:

$\alpha^2 + \beta^2 = 2^2 - 2(4/3) = 4 - 8/3 = 4/3$. [1.0 Mark]
$\dfrac{\alpha^2 + \beta^2}{\alpha \beta} = \dfrac{4/3}{4/3} = 1$. [0.5 Mark]
$2\dfrac{\alpha + \beta}{\alpha \beta} = 2 \dfrac{2}{4/3} = 3$. [0.5 Mark]
$3\alpha \beta = 3(4/3) = 4$.
Total $= 1 + 3 + 4 = 8$. [1.0 Mark]

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🎯 Official CBSE Marking Scheme:
Evaluating $\alpha^2 + \beta^2 = 4/3$: 1.0 Mark
Evaluating individual terms (1, 3, 4): 1.0 Mark
Summing to get 8: 1.0 Mark