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CISCE(English Medium) ICSE Class 9
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Syllabus

Find the square of 2a + b.

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Question

Find the square of 2a + b.

Sum
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Solution

We Know that

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

(2a + b)2 = 2a2 + b2 + 2 × 2a × b

= 4a2 + b2 + 4ab

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Algebraic Identities
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Q 1.1
Chapter 4: Expansions - Exercise 4 (A) [Page 57]

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Selina Concise Mathematics [English] Class 9 ICSE
Chapter 4 Expansions
Exercise 4 (A) | Q 1.1 | Page 57
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