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प्रश्न
Factorise the following expression.
p2 − 10p + 25
योग
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उत्तर
p2 − 10p + 25
On writing it as follows:
p2 + (−5 − 5) p + (−5) (−5)
Using the identity x2+ (a + b) x + ab = (x + a) (x + b)
= (p − 5)2
= (p − 5) (p − 5)
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