(a+b+c)square=what is the answer – InterviewSolution

1.

(a+b+c)square=what is the answer

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Answer:

(a + B + c)² = (a + X)² = a²+ 2ax + x²

= a2 + 2a (b + c) + (b + c)2

= a2 + 2ab + 2ac + (b2 + C2 + 2BC)

= a2 + b2 + c2 + 2ab + 2bc + 2ca

∴ (a + b + c)2 = a2 + b2 + c2 + 2ab + 2bc + 2ca

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