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Mathematics, 22.06.2021 15:50 diegobebe503

rút gọn biểu thức, chứng minh biểu thức \frac{\sqrt{14-6\sqrt{5} } }{\sqrt{5-3} } } \\(\frac{\sqrt{a}+2 }{a+2\sqrt{a} +1}-\frac{\sqrt{a}-2 }{a-1} )-\frac{\sqrt{a}+1 }{\sqrt{a} } =\frac{2}{a-1}

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