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प्रश्न
Factorise the following, using the identity a2 – 2ab + b2 = (a – b)2.
p2 – 2p + 1
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उत्तर
We have,
p2 – 2p + 1
= p2 – 2 × p × 1 + 12
= (p – 1)2
= (p – 1)(p – 1)
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