Arithmetic mean of two surds is 5 +9√2 and one of them is 1 + 12√2 then second surd is ……………….
Arithmetic mean of two surds is 5 +9√2 and one of them is 1 + 12√2 then second surd is …………
A) 7 + 6√2
B) 9 + 6 √2
C) 10 + 6√2
D) 8 + 6√2
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