计算:(1)10x²yz的3次方×(-2分之1xy的4次方)(2)(3分之1ab²-2ab)×2分之1ab(3)(x+3)²-(x-1)(x-2)(4)(x-2y+1)(x-2y-1)
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![计算:(1)10x²yz的3次方×(-2分之1xy的4次方)(2)(3分之1ab²-2ab)×2分之1ab(3)(x+3)²-(x-1)(x-2)(4)(x-2y+1)(x-2y-1)](/uploads/image/z/6087881-65-1.jpg?t=%E8%AE%A1%E7%AE%97%EF%BC%9A%EF%BC%881%EF%BC%8910x%26%23178%3Byz%E7%9A%843%E6%AC%A1%E6%96%B9%C3%97%EF%BC%88-2%E5%88%86%E4%B9%8B1xy%E7%9A%844%E6%AC%A1%E6%96%B9%EF%BC%89%EF%BC%882%EF%BC%89%EF%BC%883%E5%88%86%E4%B9%8B1ab%26%23178%3B-2ab%29%C3%972%E5%88%86%E4%B9%8B1ab%EF%BC%883%EF%BC%89%EF%BC%88x%2B3%EF%BC%89%26%23178%3B-%EF%BC%88x-1%29%28x-2%EF%BC%89%EF%BC%884%EF%BC%89%EF%BC%88x-2y%2B1%29%28x-2y-1%29)
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计算:(1)10x²yz的3次方×(-2分之1xy的4次方)(2)(3分之1ab²-2ab)×2分之1ab(3)(x+3)²-(x-1)(x-2)(4)(x-2y+1)(x-2y-1)
计算:(1)10x²yz的3次方×(-2分之1xy的4次方)
(2)(3分之1ab²-2ab)×2分之1ab(3)(x+3)²-(x-1)(x-2)(4)(x-2y+1)(x-2y-1)
计算:(1)10x²yz的3次方×(-2分之1xy的4次方)(2)(3分之1ab²-2ab)×2分之1ab(3)(x+3)²-(x-1)(x-2)(4)(x-2y+1)(x-2y-1)
(1)10x²yz的3次方×(-2分之1xy的4次方)
=-5x³y的5次方z³
(2)(3分之1ab²-2ab)×2分之1ab
=1/6a平方b³-a²b²
(3)(x+3)²-(x-1)(x-2)
=x²+6x+9-x²+3x-2
=3x+7
(4)(x-2y+1)(x-2y-1)
=(x-2y)²-1²
=x²-4y+4y²-1
如果本题有什么不明白可以追问,