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kinkinokudo1998


Rút gọn căn thức bận hai:
$A = \dfrac{x + 4 \sqrt[]{x} - 2 }{x + \sqrt[]{x} - 2} - \dfrac{\sqrt[]{x} + 1}{\sqrt[]{x} + 2} - \dfrac{\sqrt[]{x} - 2 }{\sqrt[]{x}} (\frac{1}{1 - \sqrt[]{x}} - 1)$
$A = \dfrac{x + 4 \sqrt[]{x} - 2 }{x + \sqrt[]{x} - 2} - \dfrac{\sqrt[]{x} + 1}{\sqrt[]{x} + 2} - \dfrac{\sqrt[]{x} - 2 }{\sqrt[]{x}} (\frac{1}{1 - \sqrt[]{x}} - 1)$
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