3x³y³·(-1/3x²y)²+(-1/3x²一)³·27
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3x³y³·(-1/3x²y)²+(-1/3x²一)³·27/8xy²,其中x=-1,y=2
先化简在求值
先化简在求值
![3x³y³·(-1/3x²y)²+(-1/3x²一)³·27](/uploads/image/z/8191475-35-5.jpg?t=3x%26%23179%3By%26%23179%3B%C2%B7%28-1%2F3x%26%23178%3By%29%26%23178%3B%2B%28-1%2F3x%26%23178%3B%E4%B8%80%29%26%23179%3B%C2%B727)
3x³y³·(-1/3x²y)²+(-1/3x²y)³·27/8xy²
=1/3x的7次方y的5次方 -1/8x的7次方y的5次方
=5/24x的7次方y的5次方
=5/24x(-1)的7次方x2的5次方
=-5/24x1x32
=-20/3
如果本题有什么不明白可以追问,
=1/3x的7次方y的5次方 -1/8x的7次方y的5次方
=5/24x的7次方y的5次方
=5/24x(-1)的7次方x2的5次方
=-5/24x1x32
=-20/3
如果本题有什么不明白可以追问,
3x³y³·(-1/3x²y)²+(-1/3x²一)³·27
一.x-y=2,则x²-2xy+y²= 二.x-y=-1,xy=3,则x³y-2x
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