One mark exercise problems I — task. Mathematics State Board, Class 8.

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1. If \(x^2 - y^2 = 16\) and \((x + y) = 8\) then \((x - y)\) is .

2. \(\frac{(a + b)(a^3 - b^3)}{(a^2 - b^2)} =\)

\(a^2 - 2ab + b^2\)
\(a^2 + ab + b^2\)
\(a^2 - ab + b^2\)
\(a^2 + 2ab + b^2\)

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