The algebraic formula x ^ 2 + 4Y ^ 2-4x + 12Y + 27 has the minimum value when x and y are values

The original formula = (X & # 178; - 4x + 4) + (4Y & # 178; + 12Y + 9) + 14
=(x-2)²+(2y+3)²+14
So when x = 2, y = - 3 / 2, there is a minimum

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