x三次方-3x²y+3xy²+4x²y-xy²+y的三次方,其中x=-1,y=-3
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![x三次方-3x²y+3xy²+4x²y-xy²+y的三次方,其中x=-1,y=-3](/uploads/image/z/806108-68-8.jpg?t=x%E4%B8%89%E6%AC%A1%E6%96%B9-3x%26%23178%3By%2B3xy%26%23178%3B%2B4x%26%23178%3By-xy%26%23178%3B%2By%E7%9A%84%E4%B8%89%E6%AC%A1%E6%96%B9%2C%E5%85%B6%E4%B8%ADx%3D-1%2Cy%3D-3)
x三次方-3x²y+3xy²+4x²y-xy²+y的三次方,其中x=-1,y=-3
x三次方-3x²y+3xy²+4x²y-xy²+y的三次方,其中x=-1,y=-3
x三次方-3x²y+3xy²+4x²y-xy²+y的三次方,其中x=-1,y=-3
x三次方-3x²y+3xy²+4x²y-xy²+y的三次方
=x三次方+2xy²+x²y+y的三次方
当x=-1,y=-3时
原式=-1-18-3-27
=-49