How to transform x-6x + 27 into (x-3) square + 18?

How to transform x-6x + 27 into (x-3) square + 18?

X square - 6x + 27
=X square - 6x + 9 + 18
=(x-3) square + 18

It is known that the cubic power of a + 3 times X of - 4Y and the cubic power of 3-B times y of 4x can be combined into one term, and the cubic power of the fourth power of the algebraic formula 3B - 6A can be obtained

Circle C: x ^ 2 + y ^ 2-2x + 4y-4 = 0, i.e. (x-1) ^ 2 + (y + 2) ^ 2 = 9, C is (1, - 2), radius is 3, let the line be y = x + B, s triangle = 1 / 2 * AB * the distance from the line to the center of the circle is

When x = 2 to the 999 power and y = (- 2) to the 999 power, the square of the algebraic formula 4x - 8xy + 4Y is_______ .

The square of 4x - the square of 8xy + 4Y
=4(x²-2xy+y²)
=4(x-y)²
=4 (999 power of 2 + 999 power of 2) &;
=2 & # 178; × 2 to the power of 2000
=2002 power of 2