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Ответ

Автор - drakerton

Ответ:

frac{16x-25y}{4sqrt{x}-5sqrt{y}} = frac{(4sqrt{x}-5sqrt{y})(4sqrt{x}+5sqrt{y})}{4sqrt{x}-5sqrt{y}sqrt{x} } =  4sqrt{x}+5sqrt{y} = 4(3-sqrt{y}) + 5sqrt{y} = 12 - 4sqrt{y} +\\ 5sqrt{y} = 12 + sqrt{y}

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