计算:(-4a³b²+8ab^4)÷(4ab²)+(b+a)(a-b)化简求值:{[(a-1)分之3a]—[(a+1)分之a]}x[a分之(a²-1)]其中a=(根号2)—2.
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![计算:(-4a³b²+8ab^4)÷(4ab²)+(b+a)(a-b)化简求值:{[(a-1)分之3a]—[(a+1)分之a]}x[a分之(a²-1)]其中a=(根号2)—2.](/uploads/image/z/7210776-48-6.jpg?t=%E8%AE%A1%E7%AE%97%EF%BC%9A%EF%BC%88-4a%26%23179%3Bb%26%23178%3B%2B8ab%5E4%EF%BC%89%C3%B7%EF%BC%884ab%26%23178%3B%EF%BC%89%2B%EF%BC%88b%2Ba%EF%BC%89%EF%BC%88a-b%EF%BC%89%E5%8C%96%E7%AE%80%E6%B1%82%E5%80%BC%EF%BC%9A%EF%BD%9B%5B%EF%BC%88a-1%EF%BC%89%E5%88%86%E4%B9%8B3a%5D%E2%80%94%5B%EF%BC%88a%2B1%EF%BC%89%E5%88%86%E4%B9%8Ba%5D%EF%BD%9Dx%5Ba%E5%88%86%E4%B9%8B%EF%BC%88a%26%23178%3B-1%EF%BC%89%5D%E5%85%B6%E4%B8%ADa%3D%EF%BC%88%E6%A0%B9%E5%8F%B72%EF%BC%89%E2%80%942.)
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计算:(-4a³b²+8ab^4)÷(4ab²)+(b+a)(a-b)化简求值:{[(a-1)分之3a]—[(a+1)分之a]}x[a分之(a²-1)]其中a=(根号2)—2.
计算:(-4a³b²+8ab^4)÷(4ab²)+(b+a)(a-b)
化简求值:{[(a-1)分之3a]—[(a+1)分之a]}x[a分之(a²-1)]其中a=(根号2)—2.
计算:(-4a³b²+8ab^4)÷(4ab²)+(b+a)(a-b)化简求值:{[(a-1)分之3a]—[(a+1)分之a]}x[a分之(a²-1)]其中a=(根号2)—2.
1:(-4a³b²+8ab^4)÷(4ab²)+(b+a)(a-b)
=-a²+2b²+a²-b²
=b²
2:{[(a-1)分之3a]—[(a+1)分之a]}x[a分之(a²-1)]
={[3a(a+1)-a(a-1)]/(a²-1)}x(a²-1)/a
=a(3a+1-a+1)/a
=2a+2
代入a=(根号2)—2
原式=2√2-4+2
=2√2-2