Multiple Choice Question (MCQ)

The value of (3+\sqrt{3} )(3-\sqrt{3} )

  1. ×

    0

  2. ×

    3

  3. 6

  4. ×

    9

Collected in the board: Difference of Two Squares

Steven Zheng posted 4 hours ago

Answer

  1. Apply difference of squares formula to the product of conjugates

    (3+\sqrt{3} )(3-\sqrt{3} )

    =3^2-(\sqrt{3} )^2

    =9-3

    =6

    So C is correct

Steven Zheng posted 4 hours ago

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