Câu 4 nha 1 câu thôi mà đc 10đ rồi hứa vote 5sao nè Question Câu 4 nha 1 câu thôi mà đc 10đ rồi hứa vote 5sao nè in progress 0 Môn Toán Eirian 1 year 2020-10-13T22:35:31+00:00 2020-10-13T22:35:31+00:00 1 Answers 98 views 0
Answers ( )
$\frac{5}{4-\sqrt{11}}+\frac{2}{3+\sqrt{7}}-\frac{3}{\sqrt{7}-2}-\frac{2\sqrt{7}-10}{2}_{}$
$=4+\sqrt{11}+3-\sqrt{7}-(\sqrt{7}+2)-\frac{2.(\sqrt{7}-5)}{2}_{}$
$=4+\sqrt{11}+3-\sqrt{7}-\sqrt{7}-2-(\sqrt{7}-5)_{}$
$=5+\sqrt{11}-2\sqrt{7}-\sqrt{7}+5_{}$
$=10+\sqrt{11}_{}$