The mean proportional between (3 + √2) and (12 −

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The mean proportional between (3 + √2) and (12 − √32) is

1. √7
2. 2 √7
3. 6
4. 15 − 3√2
  2

Correct Option: B

Mean proportional
√(3 + √2)(12 − √32)
√(3 + √2)4 (3 − √2)
= 2√9 − 2
= 2√7