If a - 2- b - 2- c - 2-2 a -2 b -2- then the value of 3 a - bb - c is-

We are given that a^2 + b^2 + c^2 = 2a 2b 2 = gt; a^2 + b^2 + c^2 2a + 2b + 2 = 0 = gt; a^2 2a +1 + b^2 + 2b + 1 + c^2 = 0 = gt; (a 1)^2 + (b ...

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Expansion of (x-y)^2

If a ∧ 2+ b ∧...

Question

If a^2+b^2+c^2=2a-2b-2, then the value of 3a-2b+c is?

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\to a, \to b, \to c

{∣ ∣ ∣ 2 \to a - 3 \to b ∣ ∣ ∣}^{2} + {∣ ∣ ∣ 2 \to b - 3 \to c ∣ ∣ ∣}^{2} + {∣ ∣ 2 \to c - 3 \to a ∣ ∣}^{2}

(a + b)^{2} + (a - b)^{2}

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- 4 a b

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^{2}

^{2}

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[\to a \to b \to c] = - 2

[\to a + 2 \to b, \to b - 2 \to c, \to c + 3 \to a] =

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