因式分解:1.a的平方乘b的平方减12.(x+1)的平方(2x-3)+(x+1)(2x-3)的平方-(x+1)(3-2x)3.已知3^2m=5,3^n=10,求(1).9^m+n (2).9^2m-n来人!
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![因式分解:1.a的平方乘b的平方减12.(x+1)的平方(2x-3)+(x+1)(2x-3)的平方-(x+1)(3-2x)3.已知3^2m=5,3^n=10,求(1).9^m+n (2).9^2m-n来人!](/uploads/image/z/3987138-66-8.jpg?t=%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%EF%BC%9A1.a%E7%9A%84%E5%B9%B3%E6%96%B9%E4%B9%98b%E7%9A%84%E5%B9%B3%E6%96%B9%E5%87%8F12.%EF%BC%88x%2B1%29%E7%9A%84%E5%B9%B3%E6%96%B9%EF%BC%882x-3%29%2B%28x%2B1%29%282x-3%29%E7%9A%84%E5%B9%B3%E6%96%B9-%EF%BC%88x%2B1%29%283-2x%293.%E5%B7%B2%E7%9F%A53%5E2m%3D5%2C3%5En%3D10%2C%E6%B1%82%281%29.9%5Em%2Bn+%282%29.9%5E2m-n%E6%9D%A5%E4%BA%BA%21)
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