A square + b square + C square - ab-3b-2c + 4 = 0 to find the value of a + B + C, please write the process and briefly explain, thank you

A square + b square + C square - ab-3b-2c + 4 = 0 to find the value of a + B + C, please write the process and briefly explain, thank you

The square of a is represented by a ^ 2. Because a ^ 2 + B ^ 2 + C ^ 2-ab-3b-2c + 4 = (a ^ 2-AB + B ^ 2 / 4) + (3b ^ 2 / 4-3b + 3) + (C ^ 2-2c + 1) = (a-b / 2) ^ 2 + 3 (b-2) ^ 2 / 4 + (C-1) ^ 2 = 0 and (a-b / 2) ^ 2 > = 0, (b-2) ^ 2 > = 0, (C-1) ^ 2 > = 0, their sum is equal to 0, so there can only be A-B / 2 = 0, B-2 = 0, C

Elden Ring Premiere

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