1/2a-1/a-b(a-b/2a-a²+b²)其中a=3-2倍根号2 b=3倍根号2-3
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![1/2a-1/a-b(a-b/2a-a²+b²)其中a=3-2倍根号2 b=3倍根号2-3](/uploads/image/z/4322011-67-1.jpg?t=1%2F2a-1%2Fa-b%EF%BC%88a-b%2F2a-a%26%23178%3B%2Bb%26%23178%3B%EF%BC%89%E5%85%B6%E4%B8%ADa%EF%BC%9D3-2%E5%80%8D%E6%A0%B9%E5%8F%B72+b%EF%BC%9D3%E5%80%8D%E6%A0%B9%E5%8F%B72-3)
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1/2a-1/a-b(a-b/2a-a²+b²)其中a=3-2倍根号2 b=3倍根号2-3
1/2a-1/a-b(a-b/2a-a²+b²)其中a=3-2倍根号2 b=3倍根号2-3
1/2a-1/a-b(a-b/2a-a²+b²)其中a=3-2倍根号2 b=3倍根号2-3
原式=1/2a-1/2a-(b+a)(b-a)/(a-b)=a+b=√2