Multiple Choice Question (MCQ)
The value of (3+\sqrt{3} )(3-\sqrt{3} )
-
×
0
-
×
3
-
✓
6
-
×
9
Answer
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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