Объяснение:
√(64/81) - √(64*81) = √64/√81 - √64*√81 = 8/9 - 8*9 = 8/9 - 72 = 8/9 - 648/9 = -640/9
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Объяснение:
√(64/81) - √(64*81) = √64/√81 - √64*√81 = 8/9 - 8*9 = 8/9 - 72 = 8/9 - 648/9 = -640/9