7+√2
7+7√2
1−7√2
1+√2
Correct answer is D
1+√83−√2
Rationalizing by multiplying through with 3+√2,
(1+√83−√2)(3+√23+√2)=3+√2+3√8+49−2
= 3+√2+3√4×2+47
= 7+7√27=1+√2
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