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Expand : (A−B+C)2 - Mathematics

Sum

Expand : (a−b+c)2

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Solution

Note : (a+b+c)2 = a2 + b2 + c2 + 2ab − 2bc − 2ca

 (a−b+c)2 = (a)2 + (−b)2 + (c)2 + 2 × a × −b + 2(−b)(c) + 2× c × a

= a2 + b2 + c2 − 2ab − 2bc + 2ca

Concept: Important Formula of Expansion
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APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 12 Identities
Exercise 12 (B) | Q 1.6 | Page 152
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