Câu 4 nha 1 câu thôi mà đc 10đ rồi hứa vote 5sao nè

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Câu 4 nha 1 câu thôi mà đc 10đ rồi hứa vote 5sao nè
cau-4-nha-1-cau-thoi-ma-dc-10d-roi-hua-vote-5sao-ne

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Eirian 1 year 2020-10-13T22:35:31+00:00 1 Answers 98 views 0

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    2020-10-13T22:37:19+00:00

    $\frac{5}{4-\sqrt{11}}+\frac{2}{3+\sqrt{7}}-\frac{3}{\sqrt{7}-2}-\frac{2\sqrt{7}-10}{2}_{}$

    $=4+\sqrt{11}+3-\sqrt{7}-(\sqrt{7}+2)-\frac{2.(\sqrt{7}-5)}{2}_{}$

    $=4+\sqrt{11}+3-\sqrt{7}-\sqrt{7}-2-(\sqrt{7}-5)_{}$

    $=5+\sqrt{11}-2\sqrt{7}-\sqrt{7}+5_{}$

    $=10+\sqrt{11}_{}$

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