先化简,再求值a²-ab分之b²-a²÷【a+a分之2ab+b²】×【a分之1+b分之1】,其中a=根号2+根号3,b=根号2-根号3
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![先化简,再求值a²-ab分之b²-a²÷【a+a分之2ab+b²】×【a分之1+b分之1】,其中a=根号2+根号3,b=根号2-根号3](/uploads/image/z/1106810-26-0.jpg?t=%E5%85%88%E5%8C%96%E7%AE%80%2C%E5%86%8D%E6%B1%82%E5%80%BCa%26%23178%3B-ab%E5%88%86%E4%B9%8Bb%26%23178%3B-a%26%23178%3B%C3%B7%E3%80%90a%2Ba%E5%88%86%E4%B9%8B2ab%2Bb%26%23178%3B%E3%80%91%C3%97%E3%80%90a%E5%88%86%E4%B9%8B1%2Bb%E5%88%86%E4%B9%8B1%E3%80%91%2C%E5%85%B6%E4%B8%ADa%EF%BC%9D%E6%A0%B9%E5%8F%B72%EF%BC%8B%E6%A0%B9%E5%8F%B73%2Cb%EF%BC%9D%E6%A0%B9%E5%8F%B72%EF%BC%8D%E6%A0%B9%E5%8F%B73)
先化简,再求值a²-ab分之b²-a²÷【a+a分之2ab+b²】×【a分之1+b分之1】,其中a=根号2+根号3,b=根号2-根号3
先化简,再求值a²-ab分之b²-a²÷【a+a分之2ab+b²】×【a分之1+b分之1】,其中a=根号2+根号3,b=根号2-根号3
先化简,再求值a²-ab分之b²-a²÷【a+a分之2ab+b²】×【a分之1+b分之1】,其中a=根号2+根号3,b=根号2-根号3
a²-ab分之b²-a²÷【a+a分之2ab+b²】×【a分之1+b分之1】,
=-(a+b)(a-b)/a(a-b)× a/(a+b)²×(a+b)/ab
=-1/ab
=-1/(√2+√3)(√2-√3)
=1