Exemplar-Exercise Problems III — task. Mathematics CBSE, Class 9.

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

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

2. If \(a + b + c =0\), then \(a^3+b^3 +c^3\) is equal to

\(0\)
\(3abc\)
\(abc\)
\(2abc\)

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