因式分解:(x-1)²-9;1/4x²-4y²=(1/2x+___)(1/2x-___);若m²-n²=6,且(m-n)²=4,则(m+n)²=;若3a+b=50,a-3b=11,则(2a-b)²-(a+2b)²=;129²-29²=(___+___)×(___-__
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![因式分解:(x-1)²-9;1/4x²-4y²=(1/2x+___)(1/2x-___);若m²-n²=6,且(m-n)²=4,则(m+n)²=;若3a+b=50,a-3b=11,则(2a-b)²-(a+2b)²=;129²-29²=(___+___)×(___-__](/uploads/image/z/1246888-64-8.jpg?t=%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%EF%BC%9A%EF%BC%88x-1%EF%BC%89%26%23178%3B-9%EF%BC%9B1%2F4x%26%23178%3B-4y%26%23178%3B%3D%EF%BC%881%2F2x%2B___%EF%BC%89%EF%BC%881%2F2x-___%EF%BC%89%3B%E8%8B%A5m%26%23178%3B-n%26%23178%3B%3D6%2C%E4%B8%94%EF%BC%88m-n%EF%BC%89%26%23178%3B%3D4%2C%E5%88%99%EF%BC%88m%2Bn%EF%BC%89%26%23178%3B%3D%EF%BC%9B%E8%8B%A53a%2Bb%3D50%2Ca-3b%3D11%2C%E5%88%99%EF%BC%882a-b%EF%BC%89%26%23178%3B-%EF%BC%88a%2B2b%EF%BC%89%26%23178%3B%3D%EF%BC%9B129%26%23178%3B-29%26%23178%3B%3D%EF%BC%88___%2B___%EF%BC%89%C3%97%EF%BC%88___-__)
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