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प्रश्न
Factorise the following expression.
p2 − q2
बेरीज
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उत्तर
p2 − q2
a = p, b = q
∴ a2 − b2 = (a + b) (a − b)
∴ (p)2 − (q)2 = (p + q) (p − q)
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