Question

It a² + b ² + c ² = 2(b+c-1)
then a + b + c =
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Answer 1

a² + b ² + c ² = 2(b+c-1)

(a + b + c)²- 2(ab + bc + ca) = 2b+2c-1

a + b + c = √(2ab+2bc+2ca+2b+2c-1)

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Answer 2

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