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Find: (A + B)(A + B) - Mathematics

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Question

Find : (a + b)(a + b)

Sum
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Solution

(a + b)(a + b) = (a + b)2
= a × a + a × b + b × a + b × b
= a2 + ab + ab + b2
= a2 + b2 + 2ab

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Chapter 4: Expansions (Including Substitution) - Exercise 4 (E) [Page 66]

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Selina Concise Mathematics [English] Class 9 ICSE
Chapter 4 Expansions (Including Substitution)
Exercise 4 (E) | Q 11.1 | Page 66
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