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Using the identity \((a + b)(a - b) = a^2 - b^2\), find the following product.
(i) \((p + 2)(p - 2) =\)
(ii) \((1 + 3b)(3b - 1) =\)
Answer variants:
\(p^2 + 4\)
\(9b^2 - 1\)
\(9b^2 + 1)
\(p^2 - 4\)
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