જો 49x^(2)-b=(7x+frac(1)(2)) (7x - frac(...

જો `49x^(2)-b=(7x+frac(1)(2)) (7x - frac(1)(2))` હોય, તો `b` ની કિંમત ......... છે.

A

0

B

`frac(1)(sqrt2)`

C

`frac(1)(4)`

D

`frac(1)(2)`

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