约分8m-2m²/m²-16 x²-1/3-6x+3x²先化简分式(a+b)²-6(a+b)+9/(a+b)²-9再求值,其中a+b=-½
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![约分8m-2m²/m²-16 x²-1/3-6x+3x²先化简分式(a+b)²-6(a+b)+9/(a+b)²-9再求值,其中a+b=-½](/uploads/image/z/4031557-61-7.jpg?t=%E7%BA%A6%E5%88%868m-2m%26%23178%3B%2Fm%26%23178%3B-16+x%26%23178%3B-1%2F3-6x%2B3x%26%23178%3B%E5%85%88%E5%8C%96%E7%AE%80%E5%88%86%E5%BC%8F%EF%BC%88a%2Bb%29%26%23178%3B-6%EF%BC%88a%2Bb%29%2B9%2F%28a%2Bb%29%26%23178%3B-9%E5%86%8D%E6%B1%82%E5%80%BC%2C%E5%85%B6%E4%B8%ADa%2Bb%3D-%26%23189%3B)
约分8m-2m²/m²-16 x²-1/3-6x+3x²先化简分式(a+b)²-6(a+b)+9/(a+b)²-9再求值,其中a+b=-½
约分8m-2m²/m²-16 x²-1/3-6x+3x²
先化简分式(a+b)²-6(a+b)+9/(a+b)²-9再求值,其中a+b=-½
约分8m-2m²/m²-16 x²-1/3-6x+3x²先化简分式(a+b)²-6(a+b)+9/(a+b)²-9再求值,其中a+b=-½
(8m-2m²)/(m²-16)
=2m(4-m) / (m+4)(m-4)
=-2m/(m+4)
(x²-1)/(3-6x+3x²)
=(x+1)(x-1) / 3(x-1)²
=(x+1)/3(x-1)