(2(a-b)³-8(a-b)²(a+b)+6b(a-b)²)/2(a-b)²速度
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![(2(a-b)³-8(a-b)²(a+b)+6b(a-b)²)/2(a-b)²速度](/uploads/image/z/5894455-31-5.jpg?t=%EF%BC%882%EF%BC%88a-b%EF%BC%89%26%23179%3B-8%EF%BC%88a-b%EF%BC%89%26%23178%3B%EF%BC%88a%2Bb%EF%BC%89%2B6b%EF%BC%88a-b%EF%BC%89%26%23178%3B%EF%BC%89%2F2%EF%BC%88a-b%EF%BC%89%26%23178%3B%E9%80%9F%E5%BA%A6)
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(2(a-b)³-8(a-b)²(a+b)+6b(a-b)²)/2(a-b)²速度
(2(a-b)³-8(a-b)²(a+b)+6b(a-b)²)/2(a-b)²速度
(2(a-b)³-8(a-b)²(a+b)+6b(a-b)²)/2(a-b)²速度
【2(a-b)³-8(a-b)²(a+b)+6b(a-b)²】/2(a-b)²
=【2(a-b)³-8(a-b)³+6b(a-b)²】/2(a-b)²
=【-6(a-b)³+6b(a-b)²】/2(a-b)²
=-3(a-b)+3
=-3a+3b+3
(2(a-b)³-8(a-b)²(a+b)+6b(a-b)²)/2(a-b)²
=2(a-b)²[(a-b)-4(a+b)+3b)]/2(a-b)²
=a-b-4a-4b+3b
=-3a-2b