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JEE Main 2023Mathematics Algebra

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2023
Official previous-year question

Verified 30 May 2026.

Question

If α and β are roots of x² - 5x + 6 = 0, then α³ + β³ is equal to:

Options

  1. A35
  2. B45
  3. C55
  4. D65

Solution

α + β = 5, αβ = 6. α³ + β³ = (α + β)³ - 3αβ(α + β) = 125 - 3(6)(5) = 125 - 90 = 35

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