问一道六升初一的数学题36mn²(y-x)+27n³(x-y)+12m²打错了,应该是36mn²(y-x)+27n³(x-y)+12m² n(x-y)
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![问一道六升初一的数学题36mn²(y-x)+27n³(x-y)+12m²打错了,应该是36mn²(y-x)+27n³(x-y)+12m² n(x-y)](/uploads/image/z/1657005-69-5.jpg?t=%E9%97%AE%E4%B8%80%E9%81%93%E5%85%AD%E5%8D%87%E5%88%9D%E4%B8%80%E7%9A%84%E6%95%B0%E5%AD%A6%E9%A2%9836mn%26sup2%3B%EF%BC%88y-x%EF%BC%89%2B27n%26sup3%3B%EF%BC%88x-y%EF%BC%89%2B12m%26sup2%3B%E6%89%93%E9%94%99%E4%BA%86%EF%BC%8C%E5%BA%94%E8%AF%A5%E6%98%AF36mn%26sup2%3B%EF%BC%88y-x%EF%BC%89%2B27n%26sup3%3B%EF%BC%88x-y%EF%BC%89%2B12m%26sup2%3B+n%EF%BC%88x-y%EF%BC%89)
问一道六升初一的数学题36mn²(y-x)+27n³(x-y)+12m²打错了,应该是36mn²(y-x)+27n³(x-y)+12m² n(x-y)
问一道六升初一的数学题
36mn²(y-x)+27n³(x-y)+12m²
打错了,应该是36mn²(y-x)+27n³(x-y)+12m² n(x-y)
问一道六升初一的数学题36mn²(y-x)+27n³(x-y)+12m²打错了,应该是36mn²(y-x)+27n³(x-y)+12m² n(x-y)
是因式分解吧.
3n(4m²-12mn+9n²)(x-y)
=3n(x-y)(2m-3n)²
题目的要求是什么 3n(x-y)(2m-3n)*2
36mn²(y-x)+27n³(x-y)+12m² n(x-y)
=(y-x)(36mn^2-27n^3-12m^2n)
=3n(y-x)(12mn-9n^2-4m^2)
=3n(x-y)(2m-3n)^2
36mn²(y-x)+27n³(x-y)+12m² n(x-y)
=n²[27n(x-y)-36m(x-y)]+12m² n(x-y)
=n[27n²(x-y)-36mn(x-y)+12m²(x-y)]
=3n(x-y)(9n²-12mn+4m²)
=3n(x-y)(3n-2mm)²
问一道六升初一的数学题36mn²(y-x)+27n³(x-y)+12m²打错了,应该是36mn²(y-x)+27n³(x-y)+12m² n(x-y)
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