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Question
Factorise the following expression.
a3 + a2 + a + 1
Sum
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Solution
We have,
a3 + a2 + a + 1
= (a3 + a2) + (a + 1)
= a2(a + 1) + 1(a + 1)
= (a + 1)(a2 + 1)
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Chapter 7: Algebraic Expression, Identities and Factorisation - Exercise [Page 234]
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