Exemplar - Find the value of 'b' — task. Maths CBSE Live product, Class 9.

If \(49x^2-b=(7x+\frac{1}{2})(7x-\frac{1}{2})\), then the value of \(b\) is

\(0\)
\(\frac{1}{2}\)
\(\frac{1}{\sqrt{2}}\)
\(\frac{1}{4}\)

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