Toán Lớp 9: Rút gọn:
$\dfrac{2x +4\sqrt{x}}{(\sqrt{x}-2) (\sqrt{x}+2)}$
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Toán Lớp 9: Rút gọn:
$\dfrac{2x +4\sqrt{x}}{(\sqrt{x}-2) (\sqrt{x}+2)}$
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