X2-(Y2-4Y+4)因式分解 快(X+Y)2+4XY(X+Y)2-4(X+Y-1)(X-1)(X-3)+1ax-bx+ay-by

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X2-(Y2-4Y+4)因式分解 快(X+Y)2+4XY(X+Y)2-4(X+Y-1)(X-1)(X-3)+1ax-bx+ay-by

X2-(Y2-4Y+4)因式分解 快(X+Y)2+4XY(X+Y)2-4(X+Y-1)(X-1)(X-3)+1ax-bx+ay-by
X2-(Y2-4Y+4)因式分解 快
(X+Y)2+4XY
(X+Y)2-4(X+Y-1)
(X-1)(X-3)+1
ax-bx+ay-by

X2-(Y2-4Y+4)因式分解 快(X+Y)2+4XY(X+Y)2-4(X+Y-1)(X-1)(X-3)+1ax-bx+ay-by
x^2 - (y^2 - 4y + 4)
= x^2 - (y - 2)^2
= (x - y + 2)(x + y - 2)