Discussion

Explanation:

Let α and ß are the roots such that α > ß.

Since sum is positive α must be positive.

Given, 
α + ß = 4, and
α – ß = 10

⇒ 2α = 14

α = 7, and
ß = -3

∴ α + ß = 4, αß = -21

The quadratic equation is x2 – 4x – 21 = 0

Hence, option (d).

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