Есть такое свойство: ✓(a/b) = ✓a/✓b
5•✓16/✓225 - ✓49/✓9 = 5•4/15 - 7/3 = 4/3-7/3 = -3/3 = -1
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Есть такое свойство: ✓(a/b) = ✓a/✓b
5•✓16/✓225 - ✓49/✓9 = 5•4/15 - 7/3 = 4/3-7/3 = -3/3 = -1