find the product using identity :-(5p-7q)(5p-7q)
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Step-by-step explanation:
5p+7q)² - (7p+5q)²
=(5p + 7q + 7p + 5q) (5p + 7q - 7p - 5q) ...m2 - n2 = (m + n)(m - n)
= (12p + 12q)(-2p + 2q)
= 2 × 12 × (q - p)(q + p)
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