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Akanki agrawal

· started a discussion

· 1 Months ago

Wrong answer & no detailed solution (Question: 336999.0 )

Can u prove, how it is 7y^2 & not 6y^2?

Plz check it again.

Question:

 If a = x + y, b = x – y, c = x + 2y, then the value of a2 + b2 + c2 – ab – bc – ca  is – 

Options:
A)

4y2

B)

7y2

C)

6y2

D)

5y2

Solution:

Ans: (b) 


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