Multiple Choice Question (MCQ)
The value of (\sqrt{5}+\sqrt{2} )(\sqrt{5}-\sqrt{2} )
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×
10
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×
7
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✓
3
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×
\sqrt{3}
Answer
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Apply difference of squares formula to the product of conjugates
(\sqrt{5}+\sqrt{2} )(\sqrt{5}-\sqrt{2} )
=(\sqrt{5} )^2-(\sqrt{2} )^2
=5-2
=3