(a - b + c)2 = কত?

A a2 + b2 + c2 + 2ab - 2bc + 2ac

B a3 - b2 + c2 - 2ab - 2bc + 2ac

C a2 + b2 + c2 - 2ab - 2bc + 2ac

D a2 + b4 + c2 - 2ab + 2bc + 2ac

Solution

Correct Answer: Option C

(a + b + c)2 = a2 + b2 + c2 + 2ab + 2bc + 2ac [মূল সূত্র]
(a - b + c)2 = a2 + b2 + c2 - 2ab - 2bc + 2ac [প্রদত্ত সূত্র]

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