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CBSE Class 10 Answered

What is the identity of : (1) (a-b+c)²                                      (2) (a+b+c)²                                      (3) (a+b-c)²
Asked by 1875012872798739 | 24 Feb, 2018, 10:43: AM
answered-by-expert Expert Answer
begin mathsize 16px style open parentheses straight a plus straight b plus straight c close parentheses squared equals straight a squared plus straight b squared plus straight c squared plus 2 ab plus 2 ac plus 2 bc replace space straight b space by space open parentheses negative straight b close parentheses space to space get open parentheses straight a plus open parentheses negative straight b close parentheses plus straight c close parentheses squared equals straight a squared plus open parentheses negative straight b close parentheses squared plus straight c squared plus 2 straight a open parentheses negative straight b close parentheses plus 2 ac plus 2 open parentheses negative straight b close parentheses straight c end style
Answered by Arun | 25 Feb, 2018, 12:09: PM

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