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Question
Factorise the following expression.
p2 − 10p + 25
Sum
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Solution
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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Chapter 12: Factorisation - EXERCISE 12.2 [Page 151]
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