计算 1.(-3xy)乘以y²-(-2xy²)²+(-2x)²乘以(-y)的四次方-10x²y四次方2.(3x+2y)(2x-3y)-(x-2y)(2x-y),其中x=-3/2,y=0.25
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![计算 1.(-3xy)乘以y²-(-2xy²)²+(-2x)²乘以(-y)的四次方-10x²y四次方2.(3x+2y)(2x-3y)-(x-2y)(2x-y),其中x=-3/2,y=0.25](/uploads/image/z/759236-68-6.jpg?t=%E8%AE%A1%E7%AE%97+1.%28-3xy%29%E4%B9%98%E4%BB%A5y%26%23178%3B-%EF%BC%88-2xy%26%23178%3B%EF%BC%89%26%23178%3B%EF%BC%8B%EF%BC%88-2x%EF%BC%89%26%23178%3B%E4%B9%98%E4%BB%A5%EF%BC%88-y%EF%BC%89%E7%9A%84%E5%9B%9B%E6%AC%A1%E6%96%B9-10x%26%23178%3By%E5%9B%9B%E6%AC%A1%E6%96%B92.%EF%BC%883x%EF%BC%8B2y%EF%BC%89%EF%BC%882x-3y%EF%BC%89-%EF%BC%88x-2y%EF%BC%89%EF%BC%882x-y%EF%BC%89%2C%E5%85%B6%E4%B8%ADx%3D-3%2F2%2Cy%3D0.25)
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计算 1.(-3xy)乘以y²-(-2xy²)²+(-2x)²乘以(-y)的四次方-10x²y四次方2.(3x+2y)(2x-3y)-(x-2y)(2x-y),其中x=-3/2,y=0.25
计算 1.(-3xy)乘以y²-(-2xy²)²+(-2x)²乘以(-y)的四次方-10x²y四次方
2.(3x+2y)(2x-3y)-(x-2y)(2x-y),其中x=-3/2,y=0.25
计算 1.(-3xy)乘以y²-(-2xy²)²+(-2x)²乘以(-y)的四次方-10x²y四次方2.(3x+2y)(2x-3y)-(x-2y)(2x-y),其中x=-3/2,y=0.25
原式=6x²-5xy-6y²-2x²+5xy-2y²
=4x²-8y²
=4*9/4-8*1/16
=17/2