y(3x-3y)²-(2y-2x)²(分解因式,
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![y(3x-3y)²-(2y-2x)²(分解因式,](/uploads/image/z/2547299-11-9.jpg?t=y%283x-3y%29%26%23178%3B-%EF%BC%882y-2x%EF%BC%89%26%23178%3B%EF%BC%88%E5%88%86%E8%A7%A3%E5%9B%A0%E5%BC%8F%2C)
y(3x-3y)²-(2y-2x)²(分解因式,
y(3x-3y)²-(2y-2x)²(分解因式,
y(3x-3y)²-(2y-2x)²(分解因式,
=9y(x-y)²-4(x-y)²
=(x-y)²(9y-4)
y(3x-3y)²-(2y-2x)²
=y*9(x-y)^2-4(x-y)^2
=(x-y)^2(9y-4)
9(x-y)^2-4(x-y)^2
=(9y-4)X(x-y)^2