因式分解:1.x+2x+1-y 2.25(m+n-3)-(3m-2n) 3.4bc-(b+c) 4.-(a+1)-2(a-1)-(a-1) 用公式法作
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![因式分解:1.x+2x+1-y 2.25(m+n-3)-(3m-2n) 3.4bc-(b+c) 4.-(a+1)-2(a-1)-(a-1) 用公式法作](/uploads/image/z/816598-46-8.jpg?t=%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%3A1.x%2B2x%2B1-y+2.25%EF%BC%88m%2Bn-3%EF%BC%89-%EF%BC%883m-2n%EF%BC%89+3.4bc-%EF%BC%88b%2Bc%EF%BC%89+4.-%EF%BC%88a%2B1%EF%BC%89-2%EF%BC%88a-1%EF%BC%89-%EF%BC%88a-1%EF%BC%89+%E7%94%A8%E5%85%AC%E5%BC%8F%E6%B3%95%E4%BD%9C)
因式分解:1.x+2x+1-y 2.25(m+n-3)-(3m-2n) 3.4bc-(b+c) 4.-(a+1)-2(a-1)-(a-1) 用公式法作
因式分解:1.x+2x+1-y 2.25(m+n-3)-(3m-2n) 3.4bc-(b+c) 4.-(a+1)-2(a-1)-(a-1) 用公式法作
因式分解:1.x+2x+1-y 2.25(m+n-3)-(3m-2n) 3.4bc-(b+c) 4.-(a+1)-2(a-1)-(a-1) 用公式法作
1.=(x+1)-y
=(x+y+1)(x-y+1)
有几题啊?