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Question
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
x2 + 2x + 1
Sum
Solution
We have,
x2 + 2x + 1
= x2 + 2 · 1 · x + 12
= (x + 1)2
= (x + 1)(x + 1)
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Chapter 7: Algebraic Expression, Identities and Factorisation - Exercise [Page 234]
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