1) a² - b² - (a - b) = (a - b)(a + b) - (a - b) = (a - b)(a + b - 1)
2) p² - b - p - b² = (p - b)(p + b) - (p + b) = (p + b)(p - b - 1)
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Answers & Comments
1) a² - b² - (a - b) = (a - b)(a + b) - (a - b) = (a - b)(a + b - 1)
2) p² - b - p - b² = (p - b)(p + b) - (p + b) = (p + b)(p - b - 1)