Ответ:
вроде так
(3m²+6mn+3n²)/(6n²-6m²)=(3(m²+mn+n²))/(6(n²-m²))=(3(m+n)²)/(6(n-m)(n+m))= =(3(m+n)²)/(6(n-m)(m+n))=(m+n)/(2(n-m))=(m+n)/(2n-2m)
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Ответ:
вроде так
(3m²+6mn+3n²)/(6n²-6m²)=(3(m²+mn+n²))/(6(n²-m²))=(3(m+n)²)/(6(n-m)(n+m))= =(3(m+n)²)/(6(n-m)(m+n))=(m+n)/(2(n-m))=(m+n)/(2n-2m)