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Question
Simplify:
(b2 – 49)(b + 7) + 343
Sum
Solution
We have,
(b2 – 49)(b + 7) + 343 = b2(b + 7) – 49(b + 7) + 343
= b3 + 7b2 – 49b – 343 + 343
= b3 – 49b + 7b2
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Chapter 7: Algebraic Expression, Identities and Factorisation - Exercise [Page 232]
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