[(x²-3x-6)/(x+2)-1]÷(x²-4)/(x²+4x+4)
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![[(x²-3x-6)/(x+2)-1]÷(x²-4)/(x²+4x+4)](/uploads/image/z/806113-1-3.jpg?t=%EF%BC%BB%EF%BC%88x%26%23178%3B-3x-6%EF%BC%89%2F%EF%BC%88x%2B2%EF%BC%89-1%EF%BC%BD%C3%B7%EF%BC%88x%26%23178%3B-4%EF%BC%89%2F%EF%BC%88x%26%23178%3B%2B4x%2B4%EF%BC%89)
[(x²-3x-6)/(x+2)-1]÷(x²-4)/(x²+4x+4)
[(x²-3x-6)/(x+2)-1]÷(x²-4)/(x²+4x+4)
[(x²-3x-6)/(x+2)-1]÷(x²-4)/(x²+4x+4)
[(x²-3x-6)/(x+2)-1]÷(x²-4)/(x²+4x+4)
=(x²-3x-6-x-2)/(x+2)×(x²+4x+4)/[(x+2)(x-2)]
=(x²-4x-8)/(x+2)×(x+2)²/[(x+2)(x-2)]
=[(x-2)²-12]/(x-2)
=x-2-12/(x-2)