作业帮[（-3mn)²m³-2m²(3mn²)³×1/2n]÷（-3m²n)²,其中m=10,n=5º
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![[（-3mn)²m³-2m²(3mn²)³×1/2n]÷（-3m²n)²,其中m=10,n=5º](/uploads/image/z/2770368-24-8.jpg?t=%5B%EF%BC%88-3mn%29%26%23178%3Bm%26%23179%3B-2m%26%23178%3B%283mn%26%23178%3B%29%26%23179%3B%C3%971%2F2n%5D%C3%B7%EF%BC%88-3m%26%23178%3Bn%29%26%23178%3B%2C%E5%85%B6%E4%B8%ADm%3D10%2Cn%3D5%26%23186%3B)
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[（-3mn)²m³-2m²(3mn²)³×1/2n]÷（-3m²n)²,其中m=10,n=5º
[（-3mn)²m³-2m²(3mn²)³×1/2n]÷（-3m²n)²,其中m=10,n=5º
[（-3mn)²m³-2m²(3mn²)³×1/2n]÷（-3m²n)²,其中m=10,n=5º
您好：
n=5º=1
[（-3mn)²m³-2m²(3mn²)³×1/2n]÷（-3m²n)²,
=（9m的5次方n²-m的5次方n的5次方）÷（9m的4次方n²）
=m-1/9mn³
=10-1/9x10x1
=10-10/9
=80/9
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[（-3mn)²m³-2m²(3mn²)³×1/2n]÷（-3m²n)