分式的:(1)a²-ab除ab-b² (2)x²-6x+9除以x²-9 (3)x²-1除以x²+4x+4除(x+1)乘x+2除1-x
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![分式的:(1)a²-ab除ab-b² (2)x²-6x+9除以x²-9 (3)x²-1除以x²+4x+4除(x+1)乘x+2除1-x](/uploads/image/z/640568-56-8.jpg?t=%E5%88%86%E5%BC%8F%E7%9A%84%EF%BC%9A%EF%BC%881%EF%BC%89a%26%23178%3B-ab%E9%99%A4ab-b%26%23178%3B+%282%29x%26%23178%3B-6x%2B9%E9%99%A4%E4%BB%A5x%26%23178%3B-9+%EF%BC%883%EF%BC%89x%26%23178%3B-1%E9%99%A4%E4%BB%A5x%26%23178%3B%2B4x%2B4%E9%99%A4%EF%BC%88x%2B1%EF%BC%89%E4%B9%98x%2B2%E9%99%A41-x)
分式的:(1)a²-ab除ab-b² (2)x²-6x+9除以x²-9 (3)x²-1除以x²+4x+4除(x+1)乘x+2除1-x
分式的
:(1)a²-ab除ab-b² (2)x²-6x+9除以x²-9 (3)x²-1除以x²+4x+4除(x+1)乘x+2除1-x
分式的:(1)a²-ab除ab-b² (2)x²-6x+9除以x²-9 (3)x²-1除以x²+4x+4除(x+1)乘x+2除1-x
(1)a²-ab除ab-b² =a(a-b)/b(a-b)=a/b (2)x²-6x+9除以x²-9 =(x-3)²/(x+3)(x-3)=(x-3)/(x+3_ (3)x²-1除以x²+4x+4除(x+1)乘x+2除1-x=(x+1)(x-1)/(x+2)²×1/(x+1) ×(x+2)×[-1/(x-1)]=-1/(x+2)
b/a;(x 3)/(x-3);-(x 1)^2/(x 2)